| Arab City, AL (District) |
| Aransas County, TX (ISD) |
| Aransas County ISD, TX (District) |
| Aransas Pass ISD, TX (District) |
| Arapaho-Butler, OK (District) |
| Arapahoe 1 Englewood, CO (District) |
| Arapahoe 2 Sheridan, CO (District) |
| Arapahoe 5 Cherry Creek, CO (District) |
| Arapahoe 6 Littleton, CO (District) |
| Arapahoe Charter School, NC (District) |
| Arapahoe County, CO (ISD) |
| Arapahoe Public Schools, NE (District) |
| Arbon Elementary District, ID (District) |
| Arbor Academy, MI (PSA) |
| Arbor Community School Agency, WI (PSA) |
