| Abbreviation | Definition |
|---|---|
| MSL | Milwaukee School of Languages |
| MSLC | Middle School Learning Center |
| MSLD | Mobile School Of Lighting Design |
| MSLE | Melbourne School of Land and Environment |
| MSLF | Montessori School of Lake Forest |
| MSLS | Milwaukee Sign Language School |
| MSMA | Maine School Management Association |
| MSMAS | Mid Sussex Martial Arts School (UK) |
| MSMC | Middle School Magnet Consortium |
| MSMC | Middle School Media Center |
| MSMES | Muscle Shoals McBride Elementary School |
| MSMP | Middle School Modernization Project |
| MSMS | Madras School of Management Science |
| MSMS | Main Street Middle School |
| MSMS | Maize South Middle School |
| MSMS | Manhattan South Middle School |
| MSMS | Manitou Springs Middle School |
| MSMS | Mississippi School for Mathematics and Science |
| MSMS | Mississippi School of Math and Science |
| MSMS | Mountain Shadows Middle School |