| Marissa CUSD 40, IL (District) |
| Maritime Academy Charter School, PA (PSA) |
| Maritime Academy of Toledo The, OH (PSA) |
| Mark Armijo Academy, NM (PSA) |
| Mark Twain R-Viii, MO (District) |
| Mark Twain Union Elementary, CA (District) |
| Mark West Union Elementary, CA (District) |
| Marked Tree School District, AR (District) |
| Markesan School District, WI (District) |
| Marlboro 01, SC (District) |
| Marlboro Central School District, NY (District) |
| Marlboro County, SC (ISD) |
| MARLBORO TOWNSHIP BOARD OF EDUCATION, NJ (District) |
| Marlborough, MA (District) |
| Marlborough School District, NH (District) |
