| Skokie SD 69, IL (District) |
| Skokie SD 73-5, IL (District) |
| Skull Valley Elementary District, AZ (District) |
| Skykomish School District, WA (District) |
| Skyline Gila River Schools Llc, AZ (District) |
| Skyline Math and Science Academy , MN (PSA) |
| Skyline R-Ii, MO (District) |
| Skyline Schools, KS (District) |
| Skyline Schools Inc., AZ (District) |
| Skyview School Inc., AZ (District) |
| Skyway Career Prep High School, OH (PSA) |
| SLAM Academy of Atlanta, GA (PSA) |
| Slater, MO (District) |
| Slaton ISD, TX (District) |
| Sleepy Eye Public School District, MN (District) |
