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Central Community Unit School District 3 (Adams County)
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Liberty Community Unit School District 2 (Adams County)
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Mendon Community Unit School District 4 (Adams County)
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Payson Community Unit School District 1 (Adams County)
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Quincy Area Vocational Technical Center (Adams County)
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Quincy Public School District 172 (Adams County)
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Cairo Unified School District 1 (Alexander County)
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Egyptian Community Unit School District 5 (Alexander County)
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Bond County Community Unit School District 2 (Bond County)
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Mulberry Grove Community Unit School District 1 (Bond County)
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Belvidere Community Unit School District 100 (Boone County)
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Boone County Special Education Cooperative (Boone County)
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North Boone Community Unit School District 200 (Boone County)
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Brown County Community Unit School District 1 (Brown County)
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Bureau Valley Community Unit School District 340 (Bureau County)
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Cherry School District 92 — operated by tuition to Dimmick Community Consolidated School District 175 from 2014 to 2017; consolidated with Dimmick CCSD 175 to form a "new" Dimmick CCSD 175 in 2017 (Bureau County)
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Dalzell School District 98 (Bureau County)
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DePue Unit School District 103 (Bureau County)
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Hall High School District 502 (Bureau County)
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La Moille Community Unit School District 303 (Bureau County)
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Ladd Community Consolidated School District 94 (Bureau County)
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Malden Community Consolidated School District 84 (Bureau County)
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Ohio Community Consolidated School District 17 (Bureau County)
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Ohio Community High School District 505 (Bureau County)
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Princeton Elementary School District 115 (Bureau County)
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Princeton High School District 500 (Bureau County)
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Spring Valley Community Consolidated School District 99 (Bureau County)
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Brussels Community Unit School District 42 (Calhoun County)
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Calhoun Community Unit School District 40 (Calhoun County)
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A-C Central Community Unit School District 262 (Cass County)
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Beardstown Community Unit School District 15 (Cass County)
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Virginia Community Unit School District 64 (Cass County)
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Champaign Unit 4 School District (Champaign County)
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Fisher Community Unit School District 1 (Champaign County)
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Gifford Community Consolidated School District 188 (Champaign County)
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Heritage Community Unit School District 8 (Champaign County)
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Ludlow Community Consolidated School District 142 (Champaign County)
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Mahomet-Seymour Community Unit School District 3 (Champaign County)
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Prarieview-Ogden Community Consolidated School District 197 (Champaign County)
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Rantoul City School District 137 (Champaign County)
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Rantoul Township High School District 193 (Champaign County)
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St. Joseph Community Consolidated School District 169 (Champaign County)
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Saint Joseph Ogden Community High School District 305 (Champaign County)
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Thomasboro Community Consolidated School District 130 (Champaign County)
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Tolono Community Unit School District 7 (Champaign County)
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Urbana School District 116 (Champaign County)
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Central A&M Community Unit District 21 (Christian County)
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Edinburg Community Unit School District 4 (Christian County)
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Morrisonville Community Unit School District 1 (Christian County)
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Pana Community Unit School District 8 (Christian County)
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South Fork School District 14 (Christian County)
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Taylorville Community Unit School District 3 (Christian County)
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Casey-Westfield Community Unit School District C-4 (Clark County)
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Marshall Community Unit School District C-2 (Clark County)
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Martinsville Community Unit School District C-3 (Clark County)
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Clay City Community Unit School District 10 (Clay County)
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Flora Community Unit School District 35 (Clay County)
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North Clay Community Unit School District 25 (Clay County)
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Albers School District 63 (Clinton County)
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Aviston School District 21 (Clinton County)
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Bartelso School District 57 (Clinton County)
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Breese Elementary School District 12 (Clinton County)
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Carlyle Community Unit School District 1 (Clinton County)
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Central Community High School District 71 (Clinton County)
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Damiansville School District 62 (Clinton County)
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Germantown School District 60 (Clinton County)
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North Wamac School District 186 (Clinton County)
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Saint Rose School District 14-15 (Clinton County)
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Wesclin Community Unit School District 3 (Clinton County)
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Willow Grove School District 46 (Clinton County)
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Charleston Community Unit School District 1 (Coles County)
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Mattoon Community Unit School District 2 (Coles County)
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Oakland Community Unit School District 5 (Coles County)
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Alsip-Hazelgreen-Oak Lawn School District 126 (Cook County)
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Arbor Park School District 145 (Cook County)
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Argo Community High School District 217 (Cook County)
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Argo Evergreen Park Reavis Oak Lawn Special Education Cooperative (Cook County)
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Arlington Heights School District 25 (Cook County)
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Atwood Heights School District 125 (Cook County)
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Avoca School District 37 (Cook County)
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Barrington Community Unit School District 220 — also serves areas in Lake County (Cook County)
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Bellwood School District 88 (Cook County)
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Berkeley School District 87 (Cook County)
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Berwyn North School District 98 (Cook County)
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Bloom Township High School District 206 (Cook County)
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Bremen Community High School District 228 (Cook County)
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Brookfield-Lagrange Park School District 95 (Cook County)
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Brookwood School District 167 (Cook County)
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Burbank School District 111 (Cook County)
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Burnham School District 154½ (Cook County)
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Calumet City School District 155 (Cook County)
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Calumet Public School District 132 (Cook County)
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Central Stickney School District 110 (Cook County)
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Chicago Heights School District 170 (Cook County)
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Chicago Ridge School District 127½ (Cook County)
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Cicero School District 99 (Cook County)
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City of Chicago School District 299 (Cook County)
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Community Consolidated School District 15 — based in Palatine (Cook County)
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Community Consolidated School District 54 — based in Schaumburg (Cook County)
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Community Consolidated School District 59 — based in Arlington Heights (Cook County)
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Community Consolidated School District 62 — based in Des Plaines (Cook County)
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Community Consolidated School District 168 — based in Sauk Village (Cook County)
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Community High School District 218 — based in Oak Lawn (Cook County)
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Consolidated High School District 230 — based in Orland Park (Cook County)
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Cook County School District 104 — based in Summit (Cook County)
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Cook County School District 130 — based in Blue Island (Cook County)
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Country Club Hills School District 160 (Cook County)
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Dolton Riverdale School District 148 (Cook County)
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Dolton School District 149 (Cook County)
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East Maine School District 63 (Cook County)
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East Prairie School District 73 (Cook County)
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Elementary School District 159 — based in Matteson, but not District 162 (Cook County)
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Elgin Area School District U46 (a unit school district) — also serves areas in DuPage and Kane County, Illinois (Cook County)
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Elmwood Park Community Unit School District 401 (Cook County)
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Evanston Township High School District 202 (Cook County)
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Evanston/Skokie School District 65 (Cook County)
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Evergreen Park Community High School District 231 (Cook County)
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Evergreen Park Elementary School District 124 (Cook County)
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Fairview School District 72 (Cook County)
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Flossmoor School District 161 (Cook County)
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Ford Heights School District 169 (Cook County)
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Forest Park School District 91 (Cook County)
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Forest Ridge School District 142 (Cook County)
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Franklin Park School District 84 (Cook County)
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General George Patton School District 133 (Cook County)
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Glencoe School District 35 (Cook County)
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Glenview Community Consolidated School District 34 (Cook County)
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Golf School District 67 (Cook County)
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Harvey School District 152 (Cook County)
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Hazel Crest School District 152½ (Cook County)
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Hillside School District 93 (Cook County)
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Homewood Flossmoor Community High School District 233 (Cook County)
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Homewood School District 153 (Cook County)
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Hoover-Schrum Memorial School District 157 (Cook County)
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Indian Springs School District 109 (Cook County)
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Kenilworth School District 38 (Cook County)
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Kirby School District 140 (Cook County)
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Komarek School District 94 (Cook County)
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LaGrange Elementary School District 102 (Cook County)
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LaGrange School District 105 South (Cook County)
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LaGrange Highlands School District 106 (Cook County)
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Lansing School District 158 (Cook County)
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Lemont Township High School District 210 (Cook County)
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Lemont-Bromberek Combined School District 113A (Cook County)
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Leyden Community High School District 212 (Cook County)
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Lincoln Elementary School District 156 (Cook County)
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Lincolnwood School District 74 (Cook County)
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Lindop School District 92 (Cook County)
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Lyons School District 103 (Cook County)
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Lyons Township High School District 204 (Cook County)
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Maine Township High School District 207 (Cook County)
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Mannheim School District 83 (Cook County)
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Matteson School District 162 — not to be confused with District 159, also based in Matteson (Cook County)
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Maywood-Melrose Park-Broadview School District 89 (Cook County)
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Midlothian School District 143 (Cook County)
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Morton Grove School District 70 (Cook County)
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J. Sterling Morton High School District 201 (Cook County)
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Mount Prospect School District 57 (Cook County)
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New Trier Township High School District 203 (Cook County)
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Niles Elementary School District 71 (Cook County)
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Niles Township High School District 219 (Cook County)
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Norridge School District 80 (Cook County)
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North Palos School District 117 (Cook County)
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Northbrook School District 27 (Cook County)
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Northbrook School District 28 (Cook County)
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Northbrook/Glenview School District 30 (Cook County)
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Northfield Township High School District 225 (Cook County)
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Oak Lawn Community High School District 229 (Cook County)
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Oak Lawn-Hometown School District 123 (Cook County)
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Oak Park and River Forest High School District 200 (Cook County)
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Oak Park Elementary School District 97 (Cook County)
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Orland School District 135 (Cook County)
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Palos Heights School District 128 (Cook County)
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Palos School District 118 (Cook County)
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Park Forest School District 163 (Cook County)
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Park Ridge-Niles School District 64 (Cook County)
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Pennoyer School District 79 (Cook County)
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Pleasantdale School District 107 (Cook County)
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Posen-Robbins School District 143½ (Cook County)
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Prairie-Hills Elementary School District 144 (Cook County)
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Prospect Heights School District 23 (Cook County)
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Proviso Township High Schools District 209 (Cook County)
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Reavis Township High School District 220 (Cook County)
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Rhodes School District 84½ (Cook County)
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Rich Township High School District 227 (Cook County)
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Ridgeland School District 122 (Cook County)
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Ridgewood Community High School District 234 (Cook County)
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River Forest Public Schools District 90 (Cook County)
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River Grove School District 85½ (Cook County)
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River Trails School District 26 (Cook County)
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Riverside-Brookfield Township District 208 (Cook County)
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Riverside School District 96 (Cook County)
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Rosemont Elementary School District 78 (Cook County)
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Sandridge School District 172 (Cook County)
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Schiller Park School District 81 (Cook County)
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Skokie School District 68 (Cook County)
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Skokie School District 69 (Cook County)
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Skokie School District 73½ (Cook County)
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South Berwyn School District 100 (Cook County)
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South Holland School District 150 (Cook County)
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South Holland School District 151 (Cook County)
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Steger School District 194 (Cook County)
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Sunnybrook School District 171 (Cook County)
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Sunset Ridge School District 29 (Cook County)
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Thornton Fractional Township High School District 215 (Cook County)
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Thornton School District 154 (Cook County)
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Thornton Township High School District 205 (Cook County)
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Tinley Park Community Consolidated School District 146 (Cook County)
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Township High School District 211 — serves Palatine and Schaumburg Townships (Cook County)
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Township High School District 214 — based in Arlington Heights (Cook County)
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Union Ridge School District 86 (Cook County)
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West Harvey-Dixmoor Public School District 147 (Cook County)
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West Northfield School District 31 (Cook County)
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Westchester Public School District 92½ (Cook County)
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Western Springs School District 101 (Cook County)
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Wheeling Community Consolidated School District 21 (Cook County)
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Willow Springs School District 108 (Cook County)
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Wilmette Public Schools District 39 (Cook County)
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Winnetka School District 36 (Cook County)
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Worth School District 127 (Cook County)
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Hutsonville Community Unit School District 1 (Crawford County)
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Oblong Community Unit School District 4 (Crawford County)
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Palestine Community Unit School District 3 (Crawford County)
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Robinson Community Unit School District 2 (Crawford County)
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Cumberland Community Unit School District 77 (Cumberland County)
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Neoga Community Unit School District 3 (Cumberland County)
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DeKalb Community Unit School District 428 (DeKalb County)
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Genoa Kingston Community Unit School District 424 (DeKalb County)
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Hiawatha Community Unit School District 426 (DeKalb County)
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Hinckley Big Rock Community Unit School District 429 (DeKalb County)
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Indian Creek Community Unit District 425 (DeKalb County)
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Sandwich Community Unit School District 430 (DeKalb County)
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Somonauk Community Unit School District 432 (DeKalb County)
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Sycamore Community Unit School District 427 (DeKalb County)
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Blue Ridge Community Unit School District 18 (DeWitt County)
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Clinton Community Unit School District 15 (DeWitt County)
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Arcola Community Unit School District 306 (Douglas County)
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Arthur Community Unit School District 305 (Douglas County)
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Tuscola Community Unit School District 301 (Douglas County)
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Villa Grove Community Unit School District 302 (Douglas County)
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McAuley School District No. 27 (1857–1992)
(Defunct) (DuPage County) -
Edgar County Community Unit District 6 (Edgar County)
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Kansas Community Unit School District 3 (Edgar County)
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Paris Community Unit School District No. 4 (Edgar County)
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Paris Union School District 95 (Edgar County)
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Shiloh Community Unit School District 1 (Edgar County)
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Edwards County Community Unit School District 1 (Edwards County)
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Altamont Community Unit School District 10 (Effingham County)
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Beecher City Community Unit School District 20 (Effingham County)
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Dieterich Community Unit School District 30 (Effingham County)
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Effingham Community Unit School District 40 (Effingham County)
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Teutopolis Community Unit School District 50 (Effingham County)
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Brownstown Community Unit School District 201 (Fayette County)
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Ramsey Community Unit School District 204 (Fayette County)
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Saint Elmo Community Unit School District 202 (Fayette County)
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Vandalia Community Unit School District 203 (Fayette County)
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Gibson City-Melvin-Sibley Community Unit School District 5 (Ford County)
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Paxton-Buckley-Loda Community Unit School District 10 (Ford County)
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Tri-Point Community Unit School District 6-J (Ford County)
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Astoria Community Unit School District 1 (Fulton County)
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Avon Community Unit School District 176 — merged to become Abingdon-Avon Community Unit School District 276 in 2013 (Fulton County)
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Canton Union School District 66 (Fulton County)
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Community Unit School District 3, Fulton County — Cuba schools, also known as North Fulton (Fulton County)
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Lewistown Community Unit School District 97 (Fulton County)
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Spoon River Valley Community Unit School District 4 (Fulton County)
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Vermont Ipava Table Grove Community Unit School District 2 — known as V.I.T. (Fulton County)
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Gallatin Community Unit School District 7 (Gallatin County)
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Carrollton Community Unit School District 1 (Greene County)
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Greenfield Community Unit School District 10 (Greene County)
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North Greene Community Unit School District 3 (Greene County)
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Braceville School District 75 (Grundy County)
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Coal City Community Unit School District 1 (Grundy County)
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Gardner Community Consolidated School District 72C (Grundy County)
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Gardner-South Wilmington Township High School District 73 (Grundy County)
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Mazon-Verona-Kinsman Elementary School District 2C (Grundy County)
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Minooka Community Consolidated School District 201 (Grundy County)
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Minooka Community High School District 111 (Grundy County)
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Morris Community High School District 101 (Grundy County)
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Morris School District 54 (Grundy County)
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Nettle Creek Community Consolidated School District 24C (Grundy County)
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Saratoga Community Consolidated School District 60C (Grundy County)
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South Wilmington Community Consolidated School District 74 (Grundy County)
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Hamilton County Community Unit School District 10 (Hamilton County)
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Carthage Elementary School District 317 (Hancock County)
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Dallas Elementary School District 327 (Hancock County)
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Hamilton Community Consolidated School District 328 (Hancock County)
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Illini West High School District 307 (Hancock County)
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La Harpe Community School District 347 (Hancock County)
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Nauvoo-Colusa Community Unit School District 325 (Hancock County)
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Southeastern Community Unit School District 337 (Hancock County)
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Warsaw Community Unit School District 316 (Hancock County)
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Mendon Community Unit School District 4 (Portions of the boundaries are in the county.) (Hancock County)
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Hardin County Community Unit School District 1 (Hardin County)
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West Central Community Unit School District 235 (Henderson County)
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AlWood Community Unit School District 225 (Henry County)
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Annawan Community Unit School District 226 (Henry County)
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Cambridge Community Unit School District 227 (Henry County)
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Colona School District 190 (Henry County)
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Galva Community Unit School District 224 (Henry County)
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Geneseo Community Unit School District 228 (Henry County)
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Kewanee Community Unit School District 229 (Henry County)
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Orion Community Unit School District 223 (Henry County)
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Wethersfield Community Unit School District 230 (Henry County)
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Central Community Unit School District 4 (Iroquois County)
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Cissna Park Community Unit School District 6 (Iroquois County)
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Crescent Iroquois Community Unit School District 249 (Iroquois County)
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Donovan Community Unit School District 3 (Iroquois County)
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Iroquois County Community Unit School District 9 (Iroquois County)
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Iroquois West Community Unit School District 10 (Iroquois County)
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Milford Community Consolidated School District 280 (Iroquois County)
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Milford Township High School District 233 (Iroquois County)
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Mississippi Valley Community Unit School District 166 — annexed to Trico CUSD 176 and Murphysboro CUSD 186 in August 1991
(Defunct) (Jackson County) -
Jasper County Community Unit School District 1 (Jasper County)
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Bethel School District 82 (Jefferson County)
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Bluford Community Consolidated School District 114 (Jefferson County)
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Farrington Community Consolidated School District 99 (Jefferson County)
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Field Community Consolidated School District 3 (Jefferson County)
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Grand Prairie Community Consolidated School District 6 (Jefferson County)
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McClellan Community Consolidated School District 12 (Jefferson County)
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Mount Vernon School District 80 (Jefferson County)
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Mount Vernon Township High School District 201 (Jefferson County)
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Opdyke-Belle Rive Community Consolidated School District 5 (Jefferson County)
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Rome Community Consolidated School District 2 (Jefferson County)
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Spring Garden School District 178 (Jefferson County)
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Summersville School District 79 (Jefferson County)
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Waltonville Community Unit School District 1 (Jefferson County)
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Webber Township High School District 204 (Jefferson County)
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Woodlawn Community Consolidated School District 4 (Jefferson County)
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Woodlawn Community High School District 205 (Jefferson County)
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Jersey Community Unit School District 100 (Jersey County)
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East Dubuque Unit School District 119 (Jo Daviess County)
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Galena Unit School District 120 (Jo Daviess County)
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River Ridge Community Unit School District 210 (Jo Daviess County)
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Scales Mound Community Unit School District 211 (Jo Daviess County)
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Stockton Community Unit School District 206 (Jo Daviess County)
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Warren Community Unit School District 205 (Jo Daviess County)
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Buncombe Consolidated School District 43 (Johnson County)
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Cypress School District 64 (Johnson County)
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Goreville Community Unit District 1 (Johnson County)
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New Simpson Hill School District 32 (Johnson County)
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Vienna High School District 133 (Johnson County)
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Vienna School District 55 (Johnson County)
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East Aurora Public School District 131 (Kane County)
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West Aurora Public School District 129 (Kane County)
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Batavia Unit School District 101 (Kane County)
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Central Community Unit School District 301 (Kane County)
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Community Unit School District 300 — primarily in McHenry County (Kane County)
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Elgin Area School District U46 (a Unit school district) — also serves areas in Cook and DuPage counties (Kane County)
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Geneva Community Unit School District 304 (Kane County)
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Kaneland Community Unit School District 302 (Kane County)
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St. Charles Community Unit School District 303 (Kane County)
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Bourbonnais School District 53 (Kankakee County)
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Bradley-Bourbonnais Community High School District 307 (Kankakee County)
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Bradley Elementary School District 61 (Kankakee County)
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Grant Park Community Unit School District 6 (Kankakee County)
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Herscher Community Unit School District 2 (Kankakee County)
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Kankakee School District 111 (Kankakee County)
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Manteno Community Unit School District 5 (Kankakee County)
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Momence Community Unit School District 1 (Kankakee County)
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Pembroke Community Consolidated School District 259 (Kankakee County)
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St. Anne Community Consolidated School District 256 (Kankakee County)
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St. Anne Community High School District 302 (Kankakee County)
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St. George Community Consolidated School District 258 (Kankakee County)
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Lisbon Community Consolidated School District 90 (Kendall County)
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Newark Community Consolidated School District 66 (Kendall County)
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Newark Community High School District 18 (Kendall County)
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Oswego Community Unit School District 308 (Kendall County)
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Plainfield Community Consolidated School District 202 — southeastern portion of county (Kendall County)
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Plano Community Unit School District 88 (Kendall County)
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Yorkville Community Unit School District 115 (Kendall County)
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Abingdon-Avon Community Unit School District 276 — also covers parts of Fulton County; formed by 2013 merger of Abingdon Community Unit School District 217 and Avon Community Unit School District 176 (Knox County)
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Galesburg Community Unit School District 205 (Knox County)
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Knoxville Community Unit School District 202 (Knox County)
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R.O.W.V.A. Community Unit School District 208 (Knox County)
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Williamsfield Community Unit School District 210 (Knox County)
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Antioch Community Consolidated School District 34 (Lake County)
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Aptakisic-Tripp Community Consolidated School District 102 (Lake County)
-
Bannockburn Elementary School District 106 (Lake County)
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Barrington Community Unit School District 220 — also covers areas in Cook County (Lake County)
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Beach Park Community Consolidated School District 3 (Lake County)
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Big Hollow School District 38 (Lake County)
-
Community Consolidated School District 46 — based in Grayslake (Lake County)
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Community High School District 117 — Antioch Community High School and Lakes Community High School (Lake County)
-
Community High School District 128 — Libertyville High School and Vernon Hills High School (Lake County)
-
Community Unit School District 95 — Lake Zurich (Lake County)
-
Deerfield School District 109 (Lake County)
-
Diamond Lake School District 76 (Lake County)
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Emmons School District 33 (Lake County)
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Fox Lake Grade School District 114 (Lake County)
-
Fremont School District 79 (Lake County)
-
Gavin School District 37 (Lake County)
-
Grant Community High School District 124 (Lake County)
-
Grass Lake School District 36 (Lake County)
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Grayslake Community High School District 127 (Lake County)
-
Gurnee School District 56 (Lake County)
-
Hawthorn Community Consolidated School District 73 (Lake County)
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Kildeer Countryside Community Consolidated School District 96 (Lake County)
-
Lake Bluff Elementary School District 65 (Lake County)
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Lake Forest Community High School District 115 (Lake County)
-
Lake Forest School District 67 (Lake County)
-
Lake Villa Community Consolidated School District 41 (Lake County)
-
Libertyville District 70 (Lake County)
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Lincolnshire-Prairie View School District 103 (Lake County)
-
Millburn Community Consolidated School District 24 (Lake County)
-
Mundelein Consolidated High School District 120 (Lake County)
-
Mundelein Elementary School District 75 (Lake County)
-
North Chicago School District 187 (Lake County)
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North Shore School District 112 (Lake County)
-
Oak Grove School District 68 (Lake County)
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Rondout School District 72 (Lake County)
-
Round Lake Area Schools District 116 (Lake County)
-
Adlai E. Stevenson High School District 125 (Lake County)
-
Township High School District 113 — headquartered in Highland Park (Lake County)
-
Warren Township High School District 121 (Lake County)
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Wauconda Community Unit School District 118 (Lake County)
-
Waukegan Community Unit School District 60 (Lake County)
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Winthrop Harbor School District 1 (Lake County)
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Woodland Community Consolidated School District 50 (Lake County)
-
Zion Elementary School District 6 (Lake County)
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Zion-Benton Township High School District 126 (Lake County)
-
Allen-Otter Creek Community Consolidated School District 65 (LaSalle County)
-
Deer Park Community Consolidated School District 82 (LaSalle County)
-
Dimmick Community Consolidated School District 175 — from 2017 also includes the territory of dissolved Cherry School District 92 (LaSalle County)
-
Earlville Community Unit School District 9 (LaSalle County)
-
Grand Ridge Community Consolidated School District 95 (LaSalle County)
-
LaSalle Elementary School District 122 (LaSalle County)
-
LaSalle-Peru Township High School District 120 (LaSalle County)
-
Leland Community Unit School District 1 (LaSalle County)
-
Lostant Community Unit School District 425 (LaSalle County)
-
Marseilles Elementary School District 150 (LaSalle County)
-
Mendota Consolidated Community School District 289 (LaSalle County)
-
Mendota Township High School District 280 (LaSalle County)
-
Miller Township Community Consolidated School District 210 (LaSalle County)
-
Oglesby Elementary School District 125 (LaSalle County)
-
Ottawa Elementary School District 141 (LaSalle County)
-
Ottawa Township High School District 140 (LaSalle County)
-
Peru Elementary School District 124 (LaSalle County)
-
Rutland Community Consolidated School District 230 (LaSalle County)
-
Seneca Community Consolidated School District 170 (LaSalle County)
-
Seneca Township High School District 160 (LaSalle County)
-
Serena Community Unit School District 2 (LaSalle County)
-
Streator Elementary School District 44 (LaSalle County)
-
Streator Township High School District 40 (LaSalle County)
-
Tonica Community Consolidated School District 79 (LaSalle County)
-
Wallace Community Consolidated School District 195 (LaSalle County)
-
Waltham Community Consolidated School District 185 (LaSalle County)
-
Lawrence County Community Unit School District 20 (Lawrence County)
-
Red Hill Community Unit School District 10 (Lawrence County)
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Amboy Community Unit School District 272 (Lee County)
-
Ashton-Franklin Center Community Unit School District 275 (Lee County)
-
Dixon Unit School District 170 (also known as Dixon Public Schools) (Lee County)
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Paw Paw Community Unit School District 271 (Lee County)
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Steward Elementary School District 220 (Lee County)
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Chester-East Lincoln Community Consolidated School District 61 (Logan County)
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Hartsburg Emden Community Unit School District 21 (Logan County)
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Lincoln Community High School District 404 (Logan County)
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Lincoln Elementary School District 27 (Logan County)
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Mt. Pulaski Community Unit School District 23 (Logan County)
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New Holland-Middletown Elementary School District 88 (Logan County)
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West Lincoln-Broadwell Elementary School District 92 (Logan County)
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Argenta-Oreana Community Unit School District 1 (Macon County)
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Decatur School District 61 (Macon County)
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Maroa Forsyth Community Unit School District 2 (Macon County)
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Meridian Community Unit School District 15 (Macon County)
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Mt. Zion Community Unit School District 3 (Macon County)
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Sangamon Valley Community Unit School District 9 (Macon County)
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Warrensburg-Latham Community Unit District 11 (Macon County)
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Bunker Hill Community Unit School District 8 (Macoupin County)
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Carlinville Community Unit School District 1 (Macoupin County)
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Gillespie Community Unit School District 7 (Macoupin County)
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Mount Olive Community Unit School District 5 (Macoupin County)
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North Mac Community Unit School District 34 (Macoupin County)
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Northwestern Community Unit School District 2 (Macoupin County)
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Southwestern Community Unit School District 9 (Macoupin County)
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Staunton Community Unit School District 6 (Macoupin County)
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Alton Community Unit School District 11 (Madison County)
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Bethalto Community Unit School District 8 (Madison County)
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Collinsville Community Unit School District 10 (Madison County)
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East Alton School District 13 (Madison County)
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East Alton-Wood River Community High School District 14 (Madison County)
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Edwardsville Community Unit School District 7 (Madison County)
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Granite City Community Unit School District 9 (Madison County)
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Highland Community Unit School District 5 (Madison County)
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Madison Community Unit School District 12 (Madison County)
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Roxana Community Unit School District 1 (Madison County)
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Triad Community Unit School District 2 (Madison County)
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Venice Community Unit School District 3 (Madison County)
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Wood River-Hartford Elementary School District 15 (Madison County)
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Central City School District 133 (Marion County)
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Centralia High School District 200 (Marion County)
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Centralia School District 135 (Marion County)
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Iuka Community Consolidated School District 7 (Marion County)
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Kell Consolidated School District 2 (Marion County)
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Odin Public School District 722 (Marion County)
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Patoka Community Unit School District 100 (Marion County)
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Raccoon Consolidated School District 1 (Marion County)
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Salem Community High School District 600 (Marion County)
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Salem School District 111 (Marion County)
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Sandoval Community Unit School District 501 (Marion County)
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Selmaville Community Consolidated School District 10 (Marion County)
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South Central Community Unit District 401 (Marion County)
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Henry-Senachwine Community Unit School District 5 (Marshall County)
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Midland Community Unit School District 7 (Marshall County)
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Havana Community Unit School District 126 (Mason County)
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Illini Central Community Unit School District 189 (Mason County)
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Midwest Central Community Unit School District 191 (Mason County)
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Joppa-Maple Grove Unit District 38 (Massac County)
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Massac Unit District 1 (Massac County)
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Bushnell Prairie City Community Unit School District 170 (McDonough County)
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Macomb Community Unit School District 185 (McDonough County)
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West Prairie Community Unit School District 103 (McDonough County)
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Alden Hebron School District 19 (McHenry County)
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Cary Community Consolidated School District 26 (McHenry County)
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Community High School District 155 — based in Crystal Lake (McHenry County)
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Community Unit School District 300 — headquartered in Algonquin; serving students in McHenry and Kane counties (McHenry County)
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Consolidated School District 158 — headquartered in Algonquin; serving students in McHenry and Kane counties (McHenry County)
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Crystal Lake Community Consolidated School District 47 (McHenry County)
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Fox River Grove Consolidated School District 3 (McHenry County)
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Harrison School District 36 (McHenry County)
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Harvard Community Unit School District 50 (McHenry County)
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Johnsburg Community Unit School District 12 (McHenry County)
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Marengo Community High School District 154 (McHenry County)
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Marengo-Union Elementary School District 165 (McHenry County)
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McHenry Community High School District 156 (McHenry County)
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McHenry School District 15 (McHenry County)
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Nippersink School District 2 (McHenry County)
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Prairie Grove Community School District 46 (McHenry County)
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Richmond-Burton Community High School District 157 (McHenry County)
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Riley Community Consolidated School District 18 (McHenry County)
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Woodstock Community Unit School District 200 (McHenry County)
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Bloomington School District 87 (McLean County)
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Heyworth Community Unit School District 4 (McLean County)
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Le Roy Community Unit School District 2 (McLean County)
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Lexington Community Unit School District 7 (McLean County)
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McLean County Unit District No. 5 (McLean County)
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Olympia Community Unit School District 16 (McLean County)
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Ridgeview Community Unit School District 19 (McLean County)
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Tri-Valley Community Unit School District 3 (McLean County)
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Athens Community Unit School District 213 (Menard County)
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Greenview Community Unit School District 200 (Menard County)
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Porta Community Unit School District 202 (Menard County)
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Mercer County School District 404 (Mercer County)
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Sherrard Community Unit School District 200 (Mercer County)
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Columbia Community Unit School District 4 (Monroe County)
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Valmeyer Community Unit School District 3 (Monroe County)
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Waterloo Community Unit School District 5 (Monroe County)
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Hillsboro Community Unit School District 3 (Montgomery County)
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Litchfield Community Unit School District 12 (Montgomery County)
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Nokomis Community Unit School District 22 (Montgomery County)
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Panhandle Community Unit School District 2 (Montgomery County)
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Franklin Community Unit School District 1 (Morgan County)
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Jacksonville School District 117 (Morgan County)
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Meredosia-Chambersburg Community Unit School District 11 (Morgan County)
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Triopia Community Unit School District 27 (Morgan County)
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Waverly Community Unit School District 6 (Morgan County)
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Okaw Valley Community Unit School District 302 (Moultrie County)
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Sullivan Community Unit School District 300 (Moultrie County)
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Byron Community Unit School District 226 (Ogle County)
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Creston Community Consolidated School District 161 (Ogle County)
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Eswood Community Consolidated District 269 — also covers part of DeKalb County (Ogle County)
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Forrestville Valley Community Unit School District 221 (Ogle County)
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Kings Consolidated School District 144 (Ogle County)
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Meridian Community Unit School District 223 (Ogle County)
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Oregon Community Unit School District 220 (Ogle County)
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Polo Community Unit School District 222 (Ogle County)
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Rochelle Community Consolidated School District 231 (Ogle County)
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Rochelle Township High School District 212 — also covers part of Lee and DeKalb counties (Ogle County)
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Bartonville School District 66 (Peoria County)
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Brimfield Community Unit School District 309 (Peoria County)
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Dunlap Community Unit School District 323 (Peoria County)
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Elmwood Community Unit School District 322 (Peoria County)
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Farmington Central Community Unit School District 265 (Peoria County)
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Hollis Consolidated School District 328 (Peoria County)
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Illini Bluffs Community Unit School District 327 (Peoria County)
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Illinois Valley Central Unit District 321 (Peoria County)
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Limestone Community High School District 310 (Peoria County)
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Limestone Walters Community Consolidated School District 316 (Peoria County)
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Monroe School District 70 (Peoria County)
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Norwood Elementary School District 63 (Peoria County)
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Oak Grove School District 68 (Peoria County)
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Peoria Heights Community Unit School District 325 (Peoria County)
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Peoria School District 150 (Peoria County)
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Pleasant Hill School District 69 (Peoria County)
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Pleasant Valley School District 62 (Peoria County)
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Princeville Community Unit School District 326 (Peoria County)
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Community Consolidated School District 204 (Perry County)
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Du Quoin Community Unit School District 300 (Perry County)
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Pinckneyville Community High School District 101 (Perry County)
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Pinckneyville School District 50 (Perry County)
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Tamaroa School District 5 (Perry County)
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Bement Community Unit School District 5 (Piatt County)
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Cerro Gordo Community Unit School District 100 (Piatt County)
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DeLand-Weldon Community Unit School District 57 (Piatt County)
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Monticello Community Unit School District 25 (Piatt County)
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Griggsville-Perry Community Unit School District 4 (Pike County)
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Pikeland Community Unit School District 10 (Pike County)
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Pleasant Hill Community Unit School District 3 (Pike County)
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Western Community Unit School District 12 (Pike County)
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Pope County Community Unit School District 1 (Pope County)
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Century Community Unit School District 100 (Pulaski County)
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Meridian Community Unit School District 101 (Pulaski County)
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Putnam County Community Unit School District 535 (Putnam County)
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Chester Community Unit School District 139 (Randolph County)
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Chester Non-High School District 122 (Randolph County)
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Coulterville Unit School District 1 (Randolph County)
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Prairie du Rocher Community Consolidated School District 134 (Randolph County)
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Red Bud Community Unit School District 132 (Randolph County)
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Sparta Community Unit School District 140 (Randolph County)
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Steeleville Community Unit School District 138 (Randolph County)
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West Richland Community Unit School District 2 — annexed into East Richland CUSD 1 in 2014
(Defunct) (Richland County) -
Carbon Cliff-Barstow School District 36 (Rock Island County)
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East Moline School District 37 (Rock Island County)
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Hampton School District 29 (Rock Island County)
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Moline-Coal Valley Community Unit School District 40 (Rock Island County)
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Riverdale Community Unit School District 100 (Rock Island County)
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Rock Island-Milan School District 41 (Rock Island County)
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Rockridge Community Unit School District 300 (Rock Island County)
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Sherrard Community Unit School District 200 (Rock Island County)
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Silvis School District 34 (Rock Island County)
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United Township High School District 30 (Rock Island County)
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Carrier Mills-Stonefort Community Unit School District 2 (Saline County)
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Eldorado Community Unit School District 4 (Saline County)
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Galatia Community Unit School District 1 (Saline County)
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Harrisburg Community Unit School District 3 (Saline County)
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Auburn Community Unit School District 10 (Sangamon County)
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Ball Chatham Community Unit School District 5 (Sangamon County)
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New Berlin Community Unit School District 16 (Sangamon County)
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Pawnee Community Unit School District 11 (Sangamon County)
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Pleasant Plains Community Unit School District 8 (Sangamon County)
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Riverton Community Unit School District 14 (Sangamon County)
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Rochester Community Unit School District 3A (Sangamon County)
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Springfield School District 186 (Sangamon County)
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Tri-City Community Unit School District 1 (Sangamon County)
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Williamsville Community Unit School District 15 (Sangamon County)
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Schuyler-Industry Community Unit School District 5 (Schuyler County)
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Scott-Morgan Community Unit School District 2 (Scott County)
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Winchester Community Unit School District 1 (Scott County)
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Cowden-Herrick Community Unit School District 3A (Shelby County)
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Shelbyville Community Unit School District 4 (Shelby County)
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Stewardson-Strasburg Community Unit District 5A (Shelby County)
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Windsor Community Unit School District 1 (Shelby County)
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Belle Valley School District 119 (St. Clair County)
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Belleville School District 118 (St. Clair County)
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Belleville Township High School District 201 (St. Clair County)
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Brooklyn Unit School District 188 (St. Clair County)
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Cahokia Community Unit School District 187 (St. Clair County)
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Central School District 104 (St. Clair County)
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Dupo Community Unit School District 196 (St. Clair County)
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East St. Louis School District 189 (St. Clair County)
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Freeburg Community Consolidated School District 70 (St. Clair County)
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Freeburg Community High School District 77 (St. Clair County)
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Grant Community Consolidated School District 110 (St. Clair County)
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Harmony Emge School District 175 (St. Clair County)
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High Mount School District 116 (St. Clair County)
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Lebanon Community Unit School District 9 (St. Clair County)
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Marissa Community Unit School District 40 (St. Clair County)
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Mascoutah Community Unit District 19 (St. Clair County)
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Millstadt Community Consolidated School District 160 (St. Clair County)
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New Athens Community Unit School District 60 (St. Clair County)
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O'Fallon Community Consolidated School District 90 (St. Clair County)
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O'Fallon Township High School District 203 (St. Clair County)
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Pontiac William Holliday School District 105 (St. Clair County)
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Shiloh Village School District 85 (St. Clair County)
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Signal Hill School District 181 (St. Clair County)
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Smithton Community Consolidated School District 130 (St. Clair County)
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St. Libory Consolidated School District 30 (St. Clair County)
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Whiteside School District 115 (St. Clair County)
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Wolf Branch School District 113 (St. Clair County)
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Bradford Community Unit School District 1 (Stark County)
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Stark County Community Unit School District 100 (Stark County)
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Dakota Community Unit School District 201 (Stephenson County)
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Freeport School District 145 (Stephenson County)
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Lena-Winslow Community Unit School District 202 (Stephenson County)
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Orangeville Community Unit School District 203 (Stephenson County)
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Pearl City Community Unit School District 200 (Stephenson County)
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Central School District 51 (Tazewell County)
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Creve Coeur School District 76 (Tazewell County)
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Deer Creek-Mackinaw Community Unit School District 701 (Tazewell County)
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Delavan Community Unit School District 703 (Tazewell County)
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District 50 Schools (Tazewell County)
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East Peoria Community High School District 309 (Tazewell County)
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East Peoria School District 86 (Tazewell County)
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Morton Community Unit School District 709 (Tazewell County)
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North Pekin & Marquette Heights School District 102 (Tazewell County)
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Pekin Community High School District 303 (Tazewell County)
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Pekin Public School District 108 (Tazewell County)
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Rankin Community School District 98 (Tazewell County)
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Robein School District 85 (Tazewell County)
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South Pekin School District 137 (Tazewell County)
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Spring Lake Community Consolidated School District 606 (Tazewell County)
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Tremont Community Unit School District 702 (Tazewell County)
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Washington Community High School District 308 (Tazewell County)
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Washington School District 52 (Tazewell County)
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Anna Community Consolidated School District 37 (Union County)
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Anna Jonesboro Community High School District 81 (Union County)
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Cobden Unit School District 17 (Union County)
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Jonesboro Community Consolidated School District 43, also sometimes listed as "Jonesboro Elementary School District" or "County of Union School District No. 43" (Union County)
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Dongola Unit School District 66 (Union County)
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Lick Creek Community Consolidated School District 16 (Union County)
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Shawnee Community Unit School District 84 (Union County)
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Allendale Community Consolidated School District 17 (Wabash County)
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Wabash Community Unit School District 348 (Wabash County)
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Monmouth-Roseville Community Unit School District 238 (Warren County)
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United Community Unit School District 304 (Warren County)
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Ashley Community Consolidated School District 15 (Washington County)
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Hoyleton Consolidated School District 29 — annexed into Nashville CCSD 49 in 2015 (Washington County)
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Irvington Community Consolidated School District 11 (Washington County)
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Nashville Community Consolidated School District 49 (Washington County)
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Nashville Community High School District 99 (Washington County)
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Oakdale Community Consolidated School District 1 (Washington County)
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West Washington County Community Unit District 10 (Washington County)
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Fairfield Community High School District 225 (Wayne County)
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Fairfield Public School District 112 (Wayne County)
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Geff Community Consolidated School District 14 (Wayne County)
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Jasper Community Consolidated School District 17 (Wayne County)
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New Hope Community Consolidated School District 6 (Wayne County)
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North Wayne Community Unit School District 200 (Wayne County)
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Wayne City Community Unit School District 100 (Wayne County)
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Carmi-White County Community Unit School District 5 (White County)
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Grayville Community Unit School District 1 (White County)
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Norris City-Omaha-Enfield Community Unit School District 3 (White County)
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East Coloma-Nelson Consolidated Elementary School District 20 (Whiteside County)
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Erie Community Unit School District 1 (Whiteside County)
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Montmorency Community Consolidated School District 145 (Whiteside County)
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Morrison Community Unit School District 6 (Whiteside County)
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Prophetstown-Lyndon-Tampico Community Unit School District 3 (Whiteside County)
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River Bend Community Unit School District 2 (Whiteside County)
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Rock Falls Elementary School District 13 (Whiteside County)
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Rock Falls Township High School District 301 (Whiteside County)
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Sterling Community Unit School District 5 (Whiteside County)
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Beecher Community Unit School District 200U (Will County)
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Chaney-Monge School District 88 (Will County)
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Channahon School District 17 (Will County)
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Crete Monee Community Unit School District 201U (Will County)
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Elwood Community Consolidated School District 203 (Will County)
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Fairmont School District 89 (Will County)
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Frankfort Community Consolidated School District 157C (Will County)
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Homer Community Consolidated School District 33C (Will County)
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Indian Prairie School District 204 (Will County)
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Joliet Public School District 86 (Will County)
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Joliet Township High School District 204 (Will County)
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Laraway Community Consolidated School District 70C (Will County)
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Lincoln-Way Community High School District 210 (Will County)
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Lockport Township High School District 205 (Will County)
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Manhattan School District 114 (Will County)
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Manteno Community Unit School District 5 — small portion in Wesley Township (Will County)
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Mokena School District 159 (Will County)
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Milne-Kelvin Grove District 91 — also known as Lockport School District 91 (Will County)
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New Lenox School District 122 (Will County)
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Peotone Community Unit School District 207U (Will County)
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Plainfield Community Consolidated School District 202 (Will County)
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Reed Custer Community Unit School District 255U (Will County)
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Richland School District 88A (Will County)
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Rockdale School District 84 (Will County)
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Steger School District 194 (Will County)
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Summit Hill School District 161 (Will County)
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Taft School District 90 (Will County)
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Troy Community Consolidated School District 30C (Will County)
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Union School District 81 (Will County)
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Valley View Community Unit School District 365U (Will County)
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Will County School District 92 (Will County)
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Wilmington School District 209-U (Will County)
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Carterville Community Unit School District 5 (Williamson County)
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Crab Orchard Community Unit School District 3 (Williamson County)
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Herrin Community Unit School District 4 (Williamson County)
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Johnston City Community Unit School District 1 (Williamson County)
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Marion Community Unit School District 2 (Williamson County)
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Durand Community Unit School District 322 (Winnebago County)
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Harlem School District 122 (Winnebago County)
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Hononegah Community High School District 207 (Winnebago County)
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Kinnikinnick Community Consolidated School District 131 (Winnebago County)
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Pecatonica Community Unit School District 321 (Winnebago County)
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Prairie Hill Community Consolidated School District 133 (Winnebago County)
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Rockford Public School District 205 (Winnebago County)
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Rockton School District 140 (Winnebago County)
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Shirland Community Consolidated School District 134 (Winnebago County)
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South Beloit Community Unit School District 320, also known as "County of Winnebago School District 320" (Winnebago County)
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Winnebago Community Unit School District 323 (Winnebago County)
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El Paso-Gridley Community Unit School District 11 (Woodford County)
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Eureka Community Unit District 140 (Woodford County)
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Fieldcrest Community Unit School District 6 (Woodford County)
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Germantown Hills School District 69 (Woodford County)
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Lowpoint-Washburn Community Unit School District 21 (Woodford County)
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Metamora Community Consolidated School District 1 (Woodford County)
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Metamora Township High School District 122 (Woodford County)
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Riverview Community Consolidated School District 2 (Woodford County)
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Roanoke Benson Community Unit School District 60 (Woodford County)
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Illinois Department of Juvenile Justice: School District 428 (Illinois Department of Corrections)
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