| Illinois School Libraries | 1171 | |
| Abingdon CUSD #217 | JZX | |
| A-C Central CUSD #262 | IKD | |
| Addison School District #4 | NP0 | |
| Adlai E. Stevenson High School District 125 | QE8 | |
| Al Wood Community Unit District 225 | KXH | |
| Alden-Hebron School District #19 | I@H | |
| Aledo CUSD #201 | JZY | |
| Alexis CUSD #400 | JZZ | |
| Alleman High School | ZAX | |
| Allendale CCSD #17 | ZAO | |
| Alliance Francaise de Chicago | A5F | |
| Altamont CUSD #10 | ZBI | |
| Altamont CUSD #10 | ZBO | |
| Althoff Catholic High School | JQ2 | |
| Alton CUSD #11 | IQ3 | |
| Amboy Community Unit School District #272 | LF9 | |
| Anna CCSD #37 | ZCO | |
| Anna-Jonesboro CCSD #81 | ZDI | |
| Annawan Community Unit District #226 | ZBW | |
| Antioch CCSD #34 | LG7 | |
| Antioch Community High School District #117 | LG2 | |
| Aptakisic-Tripp CCSD 102 | VM1 | |
| Arcola Community Unit School District #306 | A4J | |
| Arcola Community Unit School District #306 | EHO | |
| Argenta-Oreana CUSD #1 | JA2 | |
| Argenta-Oreana CUSD #1 | ZB# | |
| Argo CHSD 217 | TW4 | |
| Arlington Heights School District #25 | GP9 | |
| Armstrong Township High School District #225 | OB@ | |
| Arthur Community Unit School District #305 | IE1 | |
| Arthur Community Unit School District #305 | IU9 | |
| Ashton CUSD #275 | LM5 | |
| Astoria CUSD #1 | KVB | |
| Athens CUSD #213 | JA4 | |
| Atwood-Hammond CUSD 39 | JA5 | |
| Auburn CUSD #10 | IQ4 | |
| Aurora Central Catholic High School | NS0 | |
| Aurora Christian School | NT1 | |
| Aurora East CUSD #131 | NU0 | |
| Aurora West CUSD 129 | NU1 | |
| Avoca School District 37 | GQ8 | |
| Avon CUD #176 | KVD | |
| Ball-Chatham CUSD #5 | JG2 | |
| Ball-Chatham CUSD #5 | JG3 | |
| Ball-Chatham CUSD #5 | ZC# | |
| Ball-Chatham CUSD #5 | ZN# | |
| Bannockburn School District #106 | LZ5 | |
| Barrington CUSD 220 | QF5 | |
| Barrington CUSD 220 | ZCX | |
| Barry CUSD #1 | IKF | |
| Bartelso Elementary School District #57 | JQ3 | |
| Batavia CUSD #101 | NV0 | |
| Beach Park CCSD 3 | GX8 | |
| Beardstown CUSD #15 | IKI | |
| Beecher City CUSD #20 | ZEO | |
| Beecher Unit School District 200U | OD5 | |
| Belle Valley School District #119 | JQ4 | |
| Belle Valley School District #119 | VP1 | |
| Belleville Public School District #118 | L@Z | |
| Belleville Township HSD #201 | JQ5 | |
| Belleville Township HSD #201 | TI9 | |
| Belvidere School District #100 | LG8 | |
| Bement CUSD #5 | IG0 | |
| Benet Academy | TV2 | |
| Benjamin School District #25 | NW0 | |
| Bensenville Elementary School District #2 | I#G | |
| Bensenville Elementary School District #2 | I@J | |
| Bensenville Elementary School District #2 | I@K | |
| Bensenville Elementary School District #2 | I@P | |
| Bensenville Elementary School District #2 | NX0 | |
| Benton CCSD #47 | ZLO | |
| Benton CHSD #103 | ZFO | |
| Bethalto CUSD #8 | IQ5 | |
| Bethel School District #82 | I$C | |
| Big Hollow School District 38 | GY9 | |
| Bishop McNamara High School | OD6 | |
| Bismarck-Henning CUSD #1 | II1 | |
| Bloom High School District #206 | T4Q | |
| Bloom High School District #206 | TV9 | |
| Bloomingdale Elementary School District #13 | NY1 | |
| Bloomington SD #87 | KF1 | |
| Blue Ridge CUSD #18 | KG1 | |
| Bluford CCD #114 | ZNI | |
| Bond County CUD #2 | IQ6 | |
| Bourbonnais Elementary School District #53 | OD8 | |
| Boylan Catholic High School Library | JS3 | |
| Braceville Elementary School District #75 | OE6 | |
| Bradford CUD #1 | KEA | |
| Bradley Elementary School District #61 | I9A | |
| Bradley-Bourbonnais Community HSD #307 | OE7 | |
| Breese Elementary School District #12 | JQ6 | |
| Bremen CHSD #228 | T5Q | |
| Bremen CHSD #228 | T5U | |
| Bremen CHSD #228 | TU4 | |
| Bremen CUSD #228 | T4U | |
| Brimfield CUSD #309 | JWQ | |
| Broadview Academy | B5R | |
| Brooklyn Unit School District #188 | L8K | |
| Brown County CUSD #1 | IKJ | |
| Brownstown CUSD #201 | ZQI | |
| Brownstown CUSD #201 | ZQO | |
| Brussels CUSD #42 | IQ7 | |
| Bunker Hill CUD #8 | IQ8 | |
| Bureau Valley School District #340 | ZWV | |
| Bushnell-Prairie City CUSD #170 | KVF | |
| Butler School District #53 | B#J | |
| Byron Community School District #226 | LG3 | |
| Cahokia CUSD #187 | JQ7 | |
| Cairo School District #1 | ZRI | |
| Calhoun CUSD #40 | IQ9 | |
| Calvary Academy | ZH# | |
| Cambridge CUSD #227 | KVG | |
| Camp Point CUSD #3 | IKL | |
| Canton Union SD #66 | XJ2 | |
| Carbon Cliff-Barstow District #36 | R6Q | |
| Carbondale CHSD #165 | JGX | |
| Carbondale ESD #95 | L$L | |
| Carbondale ESD #95 | L$P | |
| Carbondale ESD #95 | L$T | |
| Carbondale ESD #95 | RZW | |
| Carbondale ESD #95 | UV9 | |
| Carlinville CUSD #1 | IR2 | |
| Carlyle CSD #1 | ILCJH | |
| Carlyle CSD #1 | JQ8 | |
| Carmel High School | CH@ | |
| Carmi-White County CUSD #5 | ZWO | |
| Carmi-White County CUSD #5 | ZXI | |
| Carrier Mills-Stonefort CUSD #2 | ZYO | |
| Carrollton CUD #1 | IR3 | |
| Carterville CUSD #5 | YFO | |
| Carterville CUSD #5 | YZO | |
| Carterville CUSD #5 | ZZO | |
| Carthage CUSD #338 | IKX | |
| Casey-Westfield Community Unit School District C-4 | IM1 | |
| Casey-Westfield Community Unit School District C-4 | M#J | |
| Casey-Westfield Community Unit School District C-4 | R4X | |
| Catlin Community Unit School District #5 | C#D | |
| Catlin Community Unit School District #5 | IO0 | |
| Center Cass School District #66 | DGQ | |
| Central A & M CUD #21 | GD9 | |
| Central A&M CUD #21 | JA3 | |
| Central Catholic High School | KJ0 | |
| Central Community HSD #71 | JQ9 | |
| Central Community Unit School District #4 | C#G | |
| Central Community Unit School District #4 | I7X | |
| Central Community Unit School District #4 | ILCGS | |
| Central Community Unit School District #4 | IQ0 | |
| Central CUSD #301 | PB0 | |
| Centralia City School District #135 | UV4 | |
| Centralia City School District #135 | UV8 | |
| Centralia City School District #135 | YMO | |
| Centralia HSD #200 | YLO | |
| Century CUSD #100 | L#Y | |
| Century CUSD #100 | YNI | |
| Cerro Gordo CUSD #100 | ZM# | |
| Chadwick-Milledgeville CUSD #399 | LM3 | |
| Champaign Community Unit 4 Schools | E7D | |
| Champaign Community Unit 4 Schools | F6K | |
| Champaign Community Unit 4 Schools | I7Y | |
| Champaign Community Unit 4 Schools | I7Z | |
| Champaign Community Unit 4 Schools | IS1 | |
| Champaign Community Unit 4 Schools | J5X | |
| Channahon School District #17 | I9B | |
| Charleston CUSD #1 | C#J | |
| Charleston CUSD #1 | C$G | |
| Charleston CUSD #1 | IW0 | |
| Charleston CUSD #1 | J7D | |
| Charleston CUSD #1 | M@W | |
| Chenoa CUSD #9 | KN0 | |
| Chester CUSD #139 | L#X | |
| Chester CUSD #139 | YNO | |
| Chester-East Lincoln CCSD #61 | ZO# | |
| Christ The King School Library | ZP# | |
| Christian Life Schools | I@F | |
| Christopher CHSD #99 | JGY | |
| Christopher CHSD #99 | YPO | |
| Cicero School District 99 | TS9 | |
| City of Chicago School District #299 | CH4 | |
| City of Chicago School District #299 | KEJ | |
| Clay City CUSD #10 | L@E | |
| Clay City CUSD #10 | YUO | |
| Clinton CUSD #15 | JA8 | |
| Clinton CUSD #15 | JA9 | |
| Clinton CUSD #15 | JD2 | |
| Clinton CUSD #15 | JD6 | |
| Clinton CUSD #15 | JG8 | |
| Clinton CUSD #15 | JL7 | |
| Clinton CUSD #15 | JL8 | |
| Coal City CUSD #1 | OF8 | |
| Cobden USD #17 | L@Q | |
| Cobden USD #17 | YWI | |
| College Preparatory School of America | P$A | |
| Collinsville CUD #10 | IR4 | |
| Colona Grade School District #190 | ZBZ | |
| Columbia CUSD #4 | JT2 | |
| Community Consolidated School District #93 | PC0 | |
| Community Consolidated School District 59 | GS4 | |
| Community High School District #218 | T6D | |
| Community High School District #218 | T6G | |
| Community High School District #218 | TQ2 | |
| Community High School District 128 | QF3 | |
| Community Unit School District #16 | ILNBE | |
| Community Unit School District #16 | ILNBL | |
| Community Unit School District #16 | JH7 | |
| Community Unit School District #2 (Serena) | OH7 | |
| Community Unit School District #6 of Edgar County | I7U | |
| Community Unit School District #6 of Edgar County | IY1 | |
| Community Unit School District 300 | GX5 | |
| Community Unit School District 300 | QO3 | |
| Community Unit School District 300 | QO4 | |
| Community Unit School District 300 | QO5 | |
| Congerville - Eureka - Goodfield Unit #140 | IE7 | |
| Consolidated High School District #230 | T6Q | |
| Consolidated High School District #230 | T6U | |
| Consolidated High School District 230 | TQ4 | |
| Cornell CCSD #426 | KO0 | |
| Cornerstone Christian Academy | I$A | |
| Coulterville USD #1 | YXI | |
| County of Will School District #88 | CM$ | |
| Cove School | GV4 | |
| Cowden-Herrick CUSD 3A | JD3 | |
| Cowden-Herrick CUSD 3A | ZYH | |
| Crab Orchard CCU #3 | YZI | |
| Creative Children's Academy | GV5 | |
| Creston CCSD #161 | I#B | |
| Crete-Monee Unit School District 201-U | TQ8 | |
| Crystal Lake CHSD 155 | P6Q | |
| Crystal Lake CHSD 155 | QF9 | |
| Crystal Lake CHSD 155 | QP7 | |
| Crystal Lake CHSD 155 | QP8 | |
| Cumberland CUSD #77 | ZR# | |
| Cumberland CUSD #77 | ZS# | |
| Cypress Elementary School #64 | XRO | |
| Dakota Community Unit School District #201 | LG4 | |
| Dallas City CUSD #336 | IKQ | |
| Damiansville Elementary SD #62 | L#A | |
| Davea Career Center | PD0 | |
| Decatur Public School District #61 | GD8 | |
| Decatur Public School District #61 | JA7 | |
| Decatur Public School District #61 | JD4 | |
| Decatur Public School District #61 | JD9 | |
| Decatur Public School District #61 | JH2 | |
| Decatur Public School District #61 | MB# | |
| Decatur Public School District #61 | MJI | |
| Decatur Public School District #61 | MR# | |
| Decatur Public School District #61 | MV# | |
| Decatur Public School District #61 | MY1 | |
| Decatur Public School District #61 | NI# | |
| Decatur Public School District #61 | NQ# | |
| Decatur Public School District #61 | NU# | |
| Decatur Public School District #61 | OBO | |
| Decatur Public School District #61 | ZD# | |
| Decatur Public School District #61 | ZV# | |
| Decatur Public School District #61 | ZY@ | |
| Decatur Public School District #61 | ZYB | |
| Decatur Public School District #61 | ZYN | |
| Decatur Public School District #61 | ZYP | |
| Decatur Public School District #61 | ZZ@ | |
| Decatur Public School District #61 | ZZG | |
| Decatur Public School District #61 | ZZL | |
| Deer Creek-Mackinaw CUSD #701 | KED | |
| Deer Park Consolidated CSD #82 | OI2 | |
| Deerfield School District 109 | DT9 | |
| DeKalb Community Unit School District #428 | LG5 | |
| DeLand-Weldon CUSD #57 | JC5 | |
| Delavan SD #703 | IG3 | |
| DePue CUSD #103 | OI3 | |
| Des Plaines CCSD 62 | GS5 | |
| Desoto CSD #86 | XTO | |
| DeVry University | JVW | |
| Diamond Lake School District 76 | LY8 | |
| Dieterich CU #30 | XUO | |
| Divernon CUSD #13 | JD5 | |
| Dixon Community Unit School District #170 | LG6 | |
| Dodds Community Consolidated School District #7 | L#D | |
| Dongola CUSD #66 | XWI | |
| Donovan CUSD #3 | D9V | |
| Donovan CUSD #3 | JC6 | |
| Downers Grove CHSD 99 | TP5 | |
| Downers Grove CHSD 99 | TQ3 | |
| Driscoll Catholic High School | PD1 | |
| Dunlap CUSD #323 | KEB | |
| DuPage High School District #88 | JVL | |
| DuPage High School District #88 | QG0 | |
| Dupo Community School District #196 | JT3 | |
| DuQuoin CUD #300 | VD6 | |
| DuQuoin CUD #300 | XWO | |
| DuQuoin CUD #300 | XZO | |
| Durand Community Unit School District #322 | LJ6 | |
| Dwight Common SD #232 | KQ0 | |
| Dwight Township High School District #230 | KQ1 | |
| Earlville CCSD #9 | OI8 | |
| East Alton ESD #13 | TH4 | |
| East Alton/Wood River CHSD #14 | IR5 | |
| East Dubuque CUSD #119 | LJ7 | |
| East Maine School District 63 | GS6 | |
| East Moline School District #37 | ZDW | |
| East Peoria CHSD #309 | JWW | |
| East Peoria Elementary Schools #86 | ILN | |
| East Prairie School District 73 | GT8 | |
| East Richland CU #1 | L#E | |
| East Richland CU #1 | VD7 | |
| East Richland CU #1 | VD8 | |
| East St. Louis School District #189 | JT4 | |
| East St. Louis School District #189 | L#J | |
| East St. Louis School District #189 | L@D | |
| East St. Louis School District #189 | L@J | |
| Eastland CUSD #308 | E3C | |
| Edinburg CUSD #4 | JD7 | |
| Edwards Co. CCUD #1 | VD9 | |
| Edwardsville CUD #7 | IR6 | |
| Effingham CUSD #40 | JD8 | |
| Effingham CUSD #40 | ZJ# | |
| Egyptian CUSD #5 | UAO | |
| El Paso CUSD #375 | KR0 | |
| Eldorado CU #4 | UBO | |
| Eldorado CU #4 | UEI | |
| Elgin Academy Library | GX6 | |
| Elgin CUSD U46 | GX4 | |
| Elgin CUSD U46 | J2R | |
| Elgin CUSD U46 | PA1 | |
| Elgin CUSD U46 | QN9 | |
| Elgin CUSD U46 | QO2 | |
| Elmhurst Unit School District 205 | TP8 | |
| Elmwood CUSD #322 | KD4 | |
| Elmwood Park Unit District 401 | TO3 | |
| Elverado CUSD #196 | UPI | |
| Elverado CUSD #196 | UQ8 | |
| Elwood CCSD #203 | OJ2 | |
| Emge-Harmony School District #175 | JT5 | |
| Erie CUSD #1 | ZDY | |
| Eswood CCSD #269 | I#E | |
| Evanston CCSD 65 | GS8 | |
| Evanston Township High School District #202 | JVF | |
| Evergreen Park CHSD 231 | LE$ | |
| Ewing-Northern Grade School | L#F | |
| Fairfield CHSD #225 | IA8 | |
| Fairfield Elementary School District #112 | C7S | |
| Farmington Central Community District #265 | IQZ | |
| Fenton Community High School District #100 | JVR | |
| Fenwick High School | TO6 | |
| Fieldcrest CUSD #6 | KT1 | |
| Fisher Unit 1 School District | JC9 | |
| Flora CUD #35 | UR3 | |
| Flora CUD #35 | UR4 | |
| Forest Ridge School District #142 | T@J | |
| Forest Ridge School District #142 | T@K | |
| Forest Ridge School District #142 | T@L | |
| Forest Ridge School District #142 | TN8 | |
| Forrestville Valley CUSD #221 | LJ2 | |
| Fox Lake School District 114 | QD7 | |
| Fox Valley Lutheran Academy | PE0 | |
| Frankfort CCSD #157C | T@G | |
| Frankfort CCSD 157C | TN9 | |
| Frankfort CUSD #168 | UR5 | |
| Frankfort CUSD #168 | YHO | |
| Franklin CUSD #1 | IKR | |
| Franklin Park School District #84 | F4P | |
| Freeburg CCD #70 | JT9 | |
| Freeburg CHSD #77 | JT6 | |
| Freeport School District #145 | LJ3 | |
| Fremont School District 79 | LY9 | |
| Fulton County CUSD #3 | KVI | |
| Galena Unit School District #120 | LJ8 | |
| Galesburg Community School District #205 | KVK | |
| Gallatin Co. SD #17 | UR8 | |
| Galva CUSD #224 | JXE | |
| Gardner Community Consolidated ESD #72C | OJ6 | |
| Gardner-South Wilmington Township HSD #73 | OJ7 | |
| Gavin School District 37 | GSJ | |
| Geneseo School District #228 | KVL | |
| Geneva CUSD 304 | ID2 | |
| Genoa-Kingston CUSD #424 | LJ9 | |
| Georgetown-Ridge Farm CUSD #4 | G2K | |
| Georgetown-Ridge Farm CUSD #4 | JV1 | |
| Giant City CCSD #130 | UR9 | |
| Gibault Catholic High School | JT7 | |
| Gibson City-Melvin-Sibley CUSD #5 | G4M | |
| Gibson City-Melvin-Sibley CUSD #5 | G7E | |
| Gibson City-Melvin-Sibley CUSD #5 | JV0 | |
| Gillespie Unit School #7 | XI9 | |
| Girard CUSD #3 | IR7 | |
| Glen Ellyn CCSD #89 | PE1 | |
| Glen Ellyn Elementary School District #41 | JVE | |
| Glenbard East High School, District #87 | ID8 | |
| Glenbard North High School, District #87 | ID7 | |
| Glenbard South High School, District #87 | TMG | |
| Glenbard West High School, District #87 | IE2 | |
| Glenbrook High School District #225 | GU7 | |
| Glenbrook High School District #225 | QH8 | |
| Glenview CCSD 34 | GQ6 | |
| Golf Elementary School District 67 | GS9 | |
| Goreville SD #1 | US7 | |
| Gower School District 62 | TM7 | |
| Grand Ridge CCSD #95 | G4R | |
| Granite City CUSD #9 | IR8 | |
| Grant Community High School District 124 | QE7 | |
| Grant Park CUSD #6 | OJ8 | |
| Grant/Illini School District #110 | JT8 | |
| Grayslake CCSD 46 | HI7 | |
| Grayslake Community High School District 127 | QF2 | |
| Grayville CUSD #1 | G3R | |
| Greenview CUSD #200 | JG4 | |
| Gridley CUSD #10 | KV1 | |
| Griggsville-Perry CUSD #4 | IKV | |
| Gurnee School District 56 | HI9 | |
| Hall High School District #502 | OK9 | |
| Hamilton CCSD #328 | IKW | |
| Hamilton Co. CUSD #10 | UT9 | |
| Hamilton Co. CUSD #10 | UX2 | |
| Hampton School District #29 | R6X | |
| Hardin Co. UD #1 | UU2 | |
| Harlem CUSD #122 | LK7 | |
| Harrisburg CUSD #3 | JGZ | |
| Harrisburg CUSD #3 | L#H | |
| Harrisburg CUSD #3 | L#O | |
| Harrisburg CUSD #3 | L#Q | |
| Harrisburg CUSD #3 | TZG | |
| Harrison School District 36 | HS@ | |
| Hartsburg Emden CUSD #21 | H$E | |
| Harvard CUSD #50 | LK2 | |
| Havana CUSD #126 | KVM | |
| Henry-Senachwine CUD #5 | IG4 | |
| Heritage CUSD #8 | JX0 | |
| Herrin CUSD #4 | L#R | |
| Herrin CUSD #4 | UU5 | |
| Herrin CUSD #4 | UU6 | |
| Herscher Community Unit School District #2 | OL8 | |
| Herscher Community Unit School District #2 | TI3 | |
| Herscher Community Unit School District #2 | TI4 | |
| Heyworth CUSD #4 | KW0 | |
| Hiawatha CUSD #426 | LK3 | |
| High Mount School District #116 | JU2 | |
| Highland CUSD #5 | IS2 | |
| Hillel Torah North Suburban Day School | GV6 | |
| Hillsboro CUD #3 | IS3 | |
| Hillside School District 93 | TL8 | |
| Hinckley-Big Rock CUSD #429 | JS4 | |
| Hinsdale Township High School District #86 | T6Z | |
| Hinsdale Township High School District #86 | TK3 | |
| Holy Cross High School | TK5 | |
| Homer CCSD #33C | ON2 | |
| Homewood-Flossmoor High School District 233 | TK8 | |
| Hononegah Community High School District #207 | LH7 | |
| Hoover-Schrum School District 157 | TJ5 | |
| Huntley CSD 158 | U3B | |
| Huntley School District 158 | HS$ | |
| Hutsonville SD #1 | UU7 | |
| Illini Bluffs UD #327 | IG7 | |
| Illini Central CUSD #189 | JG5 | |
| Illini Central CUSD #189 | ZXK | |
| Illinois Department of Corrections SD #428 | I#V | |
| Illinois Department of Corrections SD #428 | I#W | |
| Illinois Department of Corrections SD #428 | PG0 | |
| Illinois School for the Deaf | IUZ | |
| Illinois State University Laboratory SD #901 | IS# | |
| Illinois Valley Central Unit District #321 | IG8 | |
| Illiopolis CUSD 12 | JG6 | |
| Immaculate Conception High School | TJ6 | |
| Immaculate Conception School | ON5 | |
| Immaculate Heart of Mary High School | T7G | |
| Indian Creek CUSD #425 | LH9 | |
| Indian Prairie CUSD #204 | WV5 | |
| Industry CUSD #165 | KVN | |
| Iroquois County CUSD #9 | G2Y | |
| Iroquois County CUSD #9 | LU1 | |
| Iroquois County CUSD #9 | W79 | |
| Iroquois West CUSD #10 | G8M | |
| Iroquois West CUSD #10 | I7Q | |
| Irvington CCSD #11 | L@I | |
| Islamic Foundation School | PI0 | |
| Itasca School District #10 | PJ0 | |
| J. Sterling Morton High School District #201 | T7Y | |
| J. Sterling Morton High School District #201 | TJ8 | |
| Jacksonville SD #117 | IKZ | |
| Jamaica CUSD #12 | LV0 | |
| Jasper Co. CUSD #1 | UY7 | |
| Jasper Co. CUSD #1 | UY8 | |
| Jersey CUSD #100 | IS4 | |
| Jersey CUSD #100 | L#I | |
| Johnsburg CUSD #12 | LK5 | |
| Johnston City CUD #1 | RYZ | |
| Johnston City CUD #1 | UU8 | |
| Joliet Catholic Academy | ON6 | |
| Joliet Elementary School District #86 | ON7 | |
| Joliet Township High School District #204 | TI5 | |
| Joliet Township High School District #204 | TI6 | |
| Jonesboro SD #43 | UVI | |
| Joppa-Maple Grove Unit School District #38 | UV3 | |
| Jordan Catholic Schools | ZEY | |
| Kaneland CUSD #302 | KAU | |
| Kankakee School District #111 | I9G | |
| Kankakee School District #111 | OO4 | |
| Kansas CUSD #3 | LW0 | |
| Keeneyville Elementary School District #20 | PL0 | |
| Keith Country Day School | XH6 | |
| Kell CSD #C-2 | UV5 | |
| Kenilworth School District 38 | QO9 | |
| Kewanee CUSD #229 | JXH | |
| Kildeer Countryside School District #96 | LZ3 | |
| Kings CCSD #144 | I#K | |
| Kirby School District 140 | AL2 | |
| Knoxville CUSD #202 | KVP | |
| La Harpe CUSD #335 | KVQ | |
| LaGrange School District 102 | BFO | |
| Lake Bluff Elementary School District 65 | LY3 | |
| Lake County High Schools Technology Campus #849 | LKT | |
| Lake Forest Academy Library | QF6 | |
| Lake Forest Community High School District 115 | QD8 | |
| Lake Forest Country Day School | U3E | |
| Lake Park High School District 108 | JSX | |
| Lake Villa CCSD 41 | LVD | |
| Lake Zurich CCSD 95 | LZ2 | |
| Lake Zurich CCSD 95 | QO7 | |
| Laraway CCSD #70C | OO7 | |
| LaSalle Elementary School District #122 | OO8 | |
| LaSalle-Peru Township High SD #120 | OP3 | |
| Latin School of Chicago, Upper School | IJY | |
| Lawrenceville CUSD #20 | L$D | |
| Lawrenceville CUSD #20 | TDO | |
| Lawrenceville CUSD #20 | UV6 | |
| Lawrenceville CUSD #20 | ZDO | |
| Lebanon CUSD #9 | JU3 | |
| Lee Center CUSD #271 | O3F | |
| Lee Center CUSD #271 | OP4 | |
| Leland CUSD #1 | OP6 | |
| Lemont Township High School District #210 | OP8 | |
| Lemont-Bromberek CSD #113A | OP7 | |
| Lena-Winslow CUSD #202 | LK4 | |
| LeRoy CUSD #2 | KZ0 | |
| Lewistown CUSD #97 | KVR | |
| Lexington CUSD #7 | KZ1 | |
| Leyden CHSD #212 | PM0 | |
| Leyden CHSD 212 | E4L | |
| Liberty CUSD #2 | IHK | |
| Libertyville School District 70 | LY5 | |
| Limestone High School District #310 | IQY | |
| Lincoln CHSD 404 | JG7 | |
| Lincoln Elementary School District #156 | T8G | |
| Lincoln Elementary School District #27 | MS# | |
| Lincoln Elementary School District #27 | OD# | |
| Lincoln Elementary School District #27 | ZL# | |
| Lincoln Elementary School District #27 | ZU# | |
| Lincoln Elementary School District #27 | ZX@ | |
| Lincoln Way Community High SD #210 | OP9 | |
| Lincolnshire Prairie View School District 103 | LZ4 | |
| Lincolnwood School District 74 | GT6 | |
| Lisle Community Unit District #202 | BNI | |
| Lisle Community Unit District #202 | T@Q | |
| Litchfield CUSD #12 | IS5 | |
| Little Flower School | ZXD | |
| Livingston CCSD #4 | L5C | |
| Lockport Township High School District #205 | OQ2 | |
| Lockport Township High School District #205 | OQ3 | |
| Lombard School District #44 | PM1 | |
| Lostant Elementary School District #425 | I9I | |
| Lovington CUSD 303 | JG9 | |
| Lowpoint-Washburn CUSD 31 | L2W | |
| Loyola Academy | GV7 | |
| Luka CCSD #7 | L$B | |
| Lyons Township High School District #204 | T8K | |
| Lyons Township High School District 204 | BTO | |
| Macomb CUSD #185 | KVU | |
| Madison County Regional Office of Education | M4# | |
| Madison CUSD #12 | IS6 | |
| Madison CUSD #12 | L8D | |
| Maercker School District 60 | BUI | |
| Mahomet-Seymour Community Unit School District #3 | L3Q | |
| Mahomet-Seymour Community Unit School District #3 | LW9 | |
| Mahomet-Seymour Community Unit School District #3 | M#U | |
| Mahomet-Seymour Community Unit School District #3 | M#X | |
| Mahomet-Seymour Community Unit School District #3 | S@G | |
| Maine Township High School District 207 | LCK | |
| Maine Township High School District 207 | QP4 | |
| Maine Township High School District 207 | QP5 | |
| Maine Township High School District 207 | QP6 | |
| Malden Community Elementary SD #84 | OQ6 | |
| Malta CUSD #433 | LK8 | |
| Manhattan Elementary School District #114 | OQ7 | |
| Mannheim School District #83 | I#D | |
| Manteno Community Unit School District #5 | OQ9 | |
| Marengo Community High School District #154 | LK9 | |
| Marengo-Union Elementary CD #165 | LM2 | |
| Marian Catholic High School | BUO | |
| Marian Central Catholic High School | LN8 | |
| Marion CUSD #2 | RYI | |
| Marion CUSD #2 | UW4 | |
| Marion CUSD #2 | UW5 | |
| Marissa CUSD #40 | UW6 | |
| Marissa CUSD #40 | UW7 | |
| Marmion Military Academy | PN1 | |
| Maroa-Forsyth CUSD #2 | ZXJ | |
| Marquardt School District #15 | PP1 | |
| Marquette High School | OR7 | |
| Marseilles Elementary School District #150 | OR8 | |
| Marshall CUSD #C-2 | LX0 | |
| Marshall CUSD #C-2 | M#Z | |
| Marshall CUSD #C-2 | M$B | |
| Marshall CUSD #C-2 | M$D | |
| Martinsville Unit School District #C-3 | OB$ | |
| Mary, Seat of Wisdom | M7W | |
| Mascoutah CUD #19 | JU4 | |
| Mascoutah CUD #19 | L$E | |
| Mascoutah CUD #19 | UW9 | |
| Massac County USD #1 | JUS | |
| Massac County USD #1 | UX4 | |
| Massac County USD #1 | UX5 | |
| Mater Dei High School | JU5 | |
| Maternity BVM School | OT3 | |
| Mattoon CUSD #2 | M$J | |
| Mattoon CUSD #2 | M$Z | |
| Mattoon CUSD #2 | MF1 | |
| Mazon-Verona-Kinsman Elementary SD #2C | OT5 | |
| McHenry CCSD #15 | EE$ | |
| McHenry Community High School District 156 | LK6 | |
| McHenry Community High School District 156 | U3F | |
| McLean County UD #5 | OB1 | |
| Medinah Elementary School District #11 | PQ0 | |
| Mendon CUSD #4 | ITY | |
| Mendota Community Consolidated SD #289 | M$T | |
| Mendota High School District #280 | OT6 | |
| Meridian CUSD #101 | UX3 | |
| Meridian CUSD #15 | JA6 | |
| Meridian CUSD #15 | ZG# | |
| Meridian CUSD #223 | XH5 | |
| Meridian CUSD 15 | ZXG | |
| Metamora Township HSD #122 | JXK | |
| Metro East Lutheran High School Association | YW7 | |
| Midland CUSD #7 | I9J | |
| Midland CUSD #7 | OT7 | |
| Midwest Central CUSD #191 | JXD | |
| Milford CUSD 280 | MT$ | |
| Millburn CCSD 24 | GY2 | |
| Miller Township Community Consolidated SD #210 | I9K | |
| Millstadt CSD #160 | JU6 | |
| Milne-Kelvin Grove Elementary SD #91 | OT8 | |
| Minooka CCSD #201 | OT9 | |
| Minooka Community High School District #111 | OU8 | |
| Mokena School District #159 | OV2 | |
| Moline School District #40 | R@D | |
| Moline School District #40 | R@E | |
| Moline School District #40 | R@F | |
| Moline School District #40 | R@G | |
| Moline School District #40 | R7F | |
| Moline School District #40 | R7J | |
| Moline School District #40 | R7Q | |
| Moline School District #40 | R7U | |
| Moline School District #40 | R7X | |
| Moline School District #40 | R7Z | |
| Moline School District #40 | R8D | |
| Moline School District #40 | R8F | |
| Moline School District #40 | R8G | |
| Moline School District #40 | R8J | |
| Moline School District #40 | R9Y | |
| Moline School District #40 | ZFZ | |
| Momence CUSD #1 | OV3 | |
| Monmouth High School - District 38 | KVW | |
| Monticello CUSD #25 | L@G | |
| Monticello CUSD #25 | MI1 | |
| Monticello CUSD #25 | W25 | |
| Monticello CUSD #25 | W39 | |
| Montini High School | JOX | |
| Montmorency CCSD #145 | JS5 | |
| Mooseheart High School | PS0 | |
| Morris Community High SD #101 | OV5 | |
| Morris Elementary School District #54 | OV6 | |
| Morrison School District #6 | R@X | |
| Morrison School District #6 | ZLX | |
| Morrisonville CUSD #1 | ZZN | |
| Morton CUSD #709 | IE9 | |
| Morton Grove School District 70 | GT5 | |
| Mount Assisi Academy | I9L | |
| Mount Carroll CUSD #304 | LM4 | |
| Mount Olive CUD #5 | IS7 | |
| Mount Prospect School District 57 | GS3 | |
| Mount Pulaski CUSD #23 | JH3 | |
| Mount Pulaski CUSD #23 | MX# | |
| Mount Pulaski CUSD #23 | ZZH | |
| Mount Vernon School District #80 | YHI | |
| Mount Vernon Township HSD #201 | UYO | |
| Mount Zion CUSD #3 | ILMZG | |
| Mount Zion CUSD #3 | ILMZM | |
| Mount Zion CUSD #3 | JH4 | |
| Mount Zion CUSD #3 | JH5 | |
| Mount Zion CUSD #3 | MW# | |
| Mulberry Grove CUSD #1 | IS8 | |
| Mundelein Consolidated High School District 120 | QE5 | |
| Mundelein Elementary School District 75 | LY7 | |
| Mundelein Elementary School District 75 | ZMG | |
| Mundelein Elementary School District 75 | ZSX | |
| Mundelein Elementary School District 75 | ZWE | |
| Murphysboro CUSD #186 | L$G | |
| Murphysboro CUSD #186 | L$I | |
| Murphysboro CUSD #186 | UY3 | |
| Murphysboro CUSD #186 | UY4 | |
| Naperville CUSD #203 | ID3 | |
| Naperville CUSD #203 | ID4 | |
| Naperville CUSD #203 | ID5 | |
| Naperville CUSD #203 | ID6 | |
| Naperville CUSD #203 | IE3 | |
| Naperville CUSD #203 | TYU | |
| Naperville CUSD #203 | TYW | |
| Nashville CCD #49 | UY5 | |
| Nashville CCD 49 | JU7 | |
| Nashville CHSD #99 | JU8 | |
| Nauvoo-Colusa CUSD #325 | IID | |
| Neoga CUSD #3 | ILNMS | |
| Neoga CUSD #3 | JH6 | |
| Neoga CUSD #3 | JH9 | |
| Neoga CUSD #3 | MU# | |
| New Athens CUSD #60 | JU9 | |
| New Lenox School District #122 | OV8 | |
| New Lenox School District #122 | OV9 | |
| New Lenox School District #122 | OW2 | |
| New Simpson CUD #32 | UY6 | |