| Abbreviation | Definition |
|---|---|
| MISS | Merryweather In School Suspension |
| MISSA | Metchosin International Summer School of the Arts |
| MIW | Mabel I. Wilson School |
| MJA | Metropolitan Junior Academy |
| MJDS | Milwaukee Jewish Day School |
| MJDS | Montessori Jewish Day School |
| MJE | Mozelle Johnston Elementary School |
| MJGDS | Martin J. Gottlieb Day School |
| MJH | Martinez Junior High School |
| MJH | Memorial Junior High School |
| MJHS | Madison Junior High School |
| MJHS | Mapleton Junior High School |
| MJHS | Marion Jr High School |
| MJHS | Marion Junior High School |
| MJHS | Marsh Junior High School |
| MJHS | Martinez Junior High School |
| MJHS | Maryville Junior High School |
| MJHS | Massac Junior High School |
| MJHS | McCormick Junior High School |
| MJHS | Memphis Jewish High School |