| Abbreviation | Definition |
|---|---|
| MSPG | Middle School Pacing Guide |
| MSPG | Middle School Parents Group |
| MSPP | Maryland School Of Public Policy |
| MSPP | Maryland School Performance Program |
| MSPP | Massachusetts School of Professional Psychology |
| MSPP | McCourt School of Public Policy |
| MSR | Montessori School of Raleigh |
| MSRP | Michigan School Readiness Program |
| MSRT | Medical School Research Track |
| MSS | Marymount Secondary School |
| MSS | Middle School South |
| MSS | Midland Secondary School |
| MSS | Motorcycle Safety School |
| MSSA | Middlesex School Summer Arts |
| MSSA | Monteagle Sunday School Assembly |
| MSSB | Metropolitan Separate School Board |
| MSSB | Middle School Science Bowl |
| MSSC | Malaysian School Sports Council |
| MSSC | Millennium Scholastic School & College |
| MSSC | Mississippi Safe Schools Coalition |