| Thornton Twp HSD 205, IL (District) |
| Thorp School District, WA (District) |
| Thorp School District, WI (District) |
| Thousand Islands Central School District, NY (District) |
| Thrall ISD, TX (District) |
| Three Creek Jt Elem District, ID (District) |
| Three Forks Elem, MT (District) |
| Three Forks H S, MT (District) |
| Three Lakes Academy, MI (PSA) |
| Three Lakes Educational Cooperative, KS (District) |
| Three Lakes School District, WI (District) |
| Three Oaks Public School Academy, MI (PSA) |
| Three Rivers Community Schools, MI (District) |
| Three Rivers EFE System, IL (District) |
| Three Rivers ISD, TX (District) |
