| Readington Township Public School District, NJ (District) |
| Reagan Academy, UT (PSA) |
| Reagan County, TX (ISD) |
| Reagan County ISD, TX (District) |
| Real County, TX (ISD) |
| Real Salt Lake Academy High School, UT (PSA) |
| Reardan-Edwall School District, WA (District) |
| Reavis Twp HSD 220, IL (District) |
| Reconciliation Academy, TX (PSA) |
| Recovery School District-Lde, LA (District) |
| Rector School District, AR (District) |
| Red Bank Borough Public Schools, NJ (District) |
| Red Bank Charter School, NJ (District) |
| Red Bank Regional, NJ (District) |
| Red Bluff Joint Union High, CA (District) |
