| 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) |
| Three Springs Madison Sch, AL (District) |
| Three Springs New Beginnings, AL (District) |
| Three Springs New Direction, AL (District) |
| Three Springs New Tuskegee, AL (District) |
| Three Springs Paint Rock Valley, AL (District) |
| Three Village Central School District, NY (District) |
| Three Way ISD, TX (District) |
| Threshold Academy, MI (PSA) |
| Thrive Center For Success, TX (PSA) |
| THRIVE Community School, NM (PSA) |
