| Sylvania City School District, OH (District) |
| Symmes Valley Local School District, OH (District) |
| Syosset Central School District, NY (District) |
| Syracuse, KS (District) |
| Syracuse Academy of Science and Citizenship Charter School, NY (PSA) |
| Syracuse Academy Of Science Charter School, NY (PSA) |
| Syracuse Arts Academy, UT (PSA) |
| Syracuse City School District, NY (District) |
| Syracuse-Dunbar-Avoca Schools, NE (District) |
| Syringa Mountain School Inc., ID (PSA) |
| T.C.P. World Academy, OH (PSA) |
| T2 Honors Academy, OH (PSA) |
| Tabernacle Township School District, NJ (District) |
| Tacoma School District, WA (District) |
| Taconic Hills Central School District, NY (District) |
