| Mastery CS-Francis D. Pastorius Elementa, PA (PSA) |
| Mastery Cs-Gratz Campus, PA (PSA) |
| Mastery Cs-Harrity Campus, PA (PSA) |
| Mastery Cs-Mann Campus, PA (PSA) |
| Mastery Cs-Pickett Campus, PA (PSA) |
| Mastery Cs-Shoemaker Campus, PA (PSA) |
| Mastery Cs-Smedley Campus, PA (PSA) |
| Mastery Cs-Thomas Campus, PA (PSA) |
| Mastery Prep Elementary CS, PA (PSA) |
| Mastery School, MN (District) |
| Matagorda County, TX (ISD) |
| Matagorda ISD, TX (District) |
| Matanuska-Susitna Borough, AK (ISD) |
| Matanuska-Susitna Borough School District, AK (District) |
| Matawan-Aberdeen Regional School District, NJ (District) |
