| Atlanta ISD, TX (District) |
| Atlanta Public Schools, GA (District) |
| Atlanta SMART Academy, GA (PSA) |
| Atlanta Unbound Academy, GA (PSA) |
| Atlantic City Public Schools, NJ (District) |
| Atlantic Comm School District, IA (District) |
| Atlantic County Schools, NJ (ISD) |
| Atlantic County Special Services School District, NJ (District) |
| Atlantic County Vocational School District, NJ (District) |
| Atlantic Highlands School District, NJ (District) |
| Atlantis Charter (District), MA (District) |
| Atmosphere Academy Public Charter, NY (PSA) |
| Atoka, OK (District) |
| Atoka County, OK (ISD) |
| Atoka-Coal Counties Ilc, OK (District) |
