| MISD | Macomb Intermediate School District 
| Others |
| MISD | Magnolia Independent School District
| Others |
| MISD | Management and Information Systems Division
| Others |
| MISD | Mansfield Independent School District
| Others |
| MISD | Marion Independent School District
| Others |
| MISD | Marshall Independent School District
| Others |
| MISD | Maybe I Should Draw
| Others |
| MISD | McAllen Independent School District
| Others |
| MISD | McKinney Independent School District
| Others |
| MISD | Menominee Indian School District
| Others |
| MISD | Mercer Island School District
| Others |
| MISD | Mesquite Independent School District
| Others |
| MISD | Michigan Intermediate School District
| Others |
| MISD | Middlebury Initiative for Sustainable Development
| Others |
| MISD | Midland Independent School District
| Others |
| MISD | Midlothian Independent School District
| Others |
| MISD | Montessori Institute of San Diego
| Others |
| MISD | Montgomery Independent School District
| Others |
| MISD | Multiple Instruction and Single Data
| Others |
| MISD | Multiple Instruction Single Data
| Others |
| MISD | Multiple Instruction, Single Data
| Others |
| MISD | Multiple Instruction, Single Data stream
| Others |