| 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) |
| Skelly, OK (District) |
| Skiatook, OK (District) |
| Skidmore-Tynan ISD, TX (District) |
| Skokie SD 68, IL (District) |
| Skokie SD 69, IL (District) |
| Skokie SD 73-5, IL (District) |
