| School | District | County |
|---|---|---|
| A B Shepard High Sch (Campus) | Community High | Cook |
| A-C Central | A-C Central Cusd 262 | Cass |
| Aasta - Orr | City Of Chicago | Cook |
| Abingdon | Abingdon C U | Knox |
| Acad Of Comm & Tech Charter Hs | City Of Chicago | Cook |
| Ace Technical Charter | Cook | |
| Addison Trail | Du Page High | Dupage |
| Adlai E Stevenson | Adlai E Stevenson Dist 125 | Lake |
| Alden-Hebron | Alden Hebron | McHenry |
| Aledo | Aledo Comm Unit | Mercer |
| Alexis | Alexis C U | Warren |
| Altamont | Altamont Comm Unit | Effingham |
| Alton | Alton Comm Unit | Madison |
| Alwood Middle/High | Alwood Comm Unit | Henry |
| Amboy | Amboy Comm Unit | Lee |
| Amos Alonzo Stagg | Cons High | Cook |
| Amundsen | City Of Chicago | Cook |
| Anna-Jonesboro | Anna Jonesboro Comm H S Dist 81 | Union |
| Annawan | Annawan Comm Unit | Henry |
| Antioch Comm | Antioch Comm High | Lake |
| Arcola | Arcola C U | Douglas |
| Argenta-Oreana | Argenta-Oreana Comm Unit Sch D 1 | Macon |
| Argo Community | Argo Comm H S Dist 217 | Cook |
| Armstrong | Armstrong Twp Hs Dist 225 | Vermilion |
| Arthur | Arthur C U | Douglas |
| Ashton | Ashton Comm Unit | Lee |
| Aspira Charter | Cook | |
| Astoria | Astoria Comm Unit | Fulton |
| Athens | Athens Comm Unit | Menard |
| Atwood Hammond | Atwood Hammond C U | Piatt |
| Auburn | Auburn Comm Unit | Sangamon |
| Auburn | Rockford | Winnebago |
| Aurora East | Aurora East Unit | Kane |
| Austin Community Academy Hs | City Of Chicago | Cook |
| Avon | Avon Comm Unit | Fulton |
| Barrington | Barrington C U | Lake |
| Barry | Barry Comm Unit | Pike |
| Bartlett | School | Kane |
| Batavia | Batavia Unit | Kane |
| Beardstown Jr/Sr | Beardstown C U | Cass |
| Beecher | Beecher C U Sch Dist 200U | Will |
| Beecher City Jr-Sr | Beecher City C U | Effingham |
| Belleville High School-East | Belleville Twp Hs Dist 201 | St. Clair |
| Belleville High School-West | Belleville Twp Hs Dist 201 | St. Clair |
| Belvidere | Belvidere C U | Boone |
| Bement | Bement Comm Unit | Piatt |
| Benton Cons | Benton Cons High | Franklin |
| Best Practice | City Of Chicago | Cook |
| Bethany Jr-Sr | Bethany Cu | Moultrie |
| Big Picture Hs - Metro | City Of Chicago Sd 299 | Cook |