| Success Virtual Learning Centers of Michigan, MI (PSA) |
| Success-Bronx 5 Lower, NY (PSA) |
| Success-Bronx 5 Upper, NY (PSA) |
| Successful Beginnings Charter School, AZ (PSA) |
| Sudan ISD, TX (District) |
| Sudbury, MA (District) |
| Suffield School District, CT (District) |
| Suffolk, VA (District) |
| Suffolk County, NY (ISD) |
| Suffolk County, MA (ISD) |
| Sugar Creek Charter, NC (District) |
| Sugar Valley Rural Cs, PA (PSA) |
| Sugar-Salem Joint District, ID (District) |
| Sullivan, MO (District) |
| Sullivan Boces, NY (ISD) |
