| Arenac Eastern School District, MI (District) |
| ARESC, AR (ISD) |
| Argenta-Oreana CUSD 1, IL (District) |
| Argo CHSD 217, IL (District) |
| Argonia Public Schools, KS (District) |
| Argos Community Schools, IN (District) |
| Argyle Central School District, NY (District) |
| Argyle ISD, TX (District) |
| Argyle School District, WI (District) |
| Arickaree R-2, CO (District) |
| Arise Academy Charter High School, PA (District) |
| Aristoi Classical Academy, TX (PSA) |
| Aristotle Academy, UT (PSA) |
| Arizona Academy Of Science And Technology Inc., AZ (District) |
| Arizona Agribusiness & Equine Center Inc, AZ (District) |
