| South Lane Sd 45J3, OR (District) |
| South Lemhi District, ID (District) |
| South Lewis Central School District, NY (District) |
| South Lyon Community Schools, MI (District) |
| South Macoupin Association, IL (District) |
| South Madison Com Sch Corp, IN (District) |
| South Manor School District, NY (DISTRICT) |
| South Middlesex Regional Vocational Technical, MA (District) |
| South Middleton SD, PA (District) |
| South Milwaukee School District, WI (District) |
| South Monterey County Joint Union High, CA (District) |
| South Montgomery Com Sch Corp, IN (District) |
| South Mountain Secure Trmnt Un, PA (District) |
| South Mountain-Hickory Common School District, NY (District) |
| South Newton School Corp, IN (District) |
