| Sisu Environmental School, MN (PSA) |
| Sisulu-walker Charter School Of Harlem, NY (PSA) |
| Sisulu-Walker Cs, NY (PSA) |
| Sitka Borough, AK (ISD) |
| Sitka School District, AK (District) |
| Siuslaw Sd 97J, OR (District) |
| Sivells Bend ISD, TX (District) |
| Six Directions Indigenous School, NM (PSA) |
| Six District Voc Ed Compact CTPD, OH (District) |
| Skagit County, WA (ISD) |
| Skagway Borough, AK (ISD) |
| Skagway City School District, AK (District) |
| Skamania County, WA (ISD) |
| Skamania School District, WA (District) |
| Skaneateles Central School District, NY (District) |
