| 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) |
| Three Rivers Local School District, OH (District) |
| Three Rivers Montessori School, MN (PSA) |
| Three Rivers Union Elementary, CA (District) |
| Three Rivers/Josephine County Sd, OR (District) |
| Three Springs Courtland Sch, AL (District) |
