| Achievement House Cs, PA (PSA) |
| Achievement School District, TN (District) |
| AchievePoint Career Academy - Cincinnati, OH (PSA) |
| AchievePoint Career Academy - Columbus, OH (PSA) |
| Achille, OK (District) |
| Ackerman Charter, CA (District) |
| Acorn Montessori Charter School, AZ (PSA) |
| ACT Academy Cyber CS, PA (PSA) |
| Acton, MA (District) |
| Acton School Department, ME (District) |
| Acton-Agua Dulce Unified, CA (District) |
| Acton-Boxborough, MA (District) |
| Acushnet, MA (District) |
| Ad Prima Cs, PA (PSA) |
| Ada, OK (District) |
