| Mastbaum Jules E AVTS | 651 | vocational | high |
| Masterman Julia R Sec Sch | 1,183 | regular | other |
| MASTERS ELEMENTARY SCHOOL | 281 | regular | other |
| Mastery CHS-Lenfest Campus | 660 | regular | other |
| Mastery CS - Mann Campus | 573 | regular | elementary |
| Mastery CS - Thomas Campus | 1,314 | regular | other |
| Mastery CS -Shoemaker Campus | 722 | regular | other |
| Mastery CS John Wister Elementary | 506 | regular | elementary |
| Mastery CS-Cleveland Elementary | 739 | regular | elementary |
| Mastery CS-Clymer Elementary | 419 | regular | elementary |
| Mastery CS-Francis D. Pastorius Elementa | 647 | regular | elementary |
| Mastery CS-Gratz Campus | 1,048 | regular | other |
| Mastery CS-Hardy Williams | 1,253 | regular | other |
| Mastery CS-Harrity Campus | 750 | regular | elementary |
| Mastery CS-Pickett Campus | 929 | regular | other |
| Mastery CS-Smedley Campus | 751 | regular | elementary |
| Mastery Prep Elementary CS | 598 | regular | elementary |
| Mastery Schools of Camden Inc. | 2,873 | regular | other |
| Masuda (Kazuo) Middle | 768 | regular | middle |
| Masuk High School | 1,044 | regular | high |
| Mat-Su Career & Tech Ed High School | 705 | vocational | high |
| MATA INT | 753 | regular | elementary |
| Matamoras Elementary School | 102 | regular | elementary |
| MATANZAS HIGH SCHOOL | 2,102 | regular | other |
| Matapeake Elementary School | 472 | regular | other |
| Matapeake Middle School | 360 | regular | middle |
| Matawan Regional High School | 1,038 | regular | high |
| Matawan-Aberdeen Middle School | 835 | regular | middle |
| MATCH Charter Public School | 1,189 | regular | other |
| Matchbook Learning | 707 | regular | elementary |
| MATER ACADEMY | 1,521 | regular | elementary |
| MATER ACADEMY (MIAMI BEACH) | 586 | regular | elementary |
| MATER ACADEMY AT ST CLOUD | 612 | regular | elementary |
| MATER ACADEMY BAY ELEMENTARY | 917 | regular | elementary |
| MATER ACADEMY BAY HIGH SCHOOL | 390 | regular | high |
| MATER ACADEMY BAY MIDDLE SCHOOL | 518 | regular | middle |
| MATER ACADEMY CHARTER HIGH SCHOOL | 1,611 | regular | high |
| MATER ACADEMY CHARTER MIDDLE SCHOOL | 1,219 | regular | middle |
| MATER ACADEMY DAVENPORT | 815 | regular | elementary |
| Mater Academy East | 2,492 | regular | other |
| MATER ACADEMY EAST CHARTER SCHOOL | 573 | regular | elementary |
| MATER ACADEMY KIWANIS | 236 | regular | elementary |
| MATER ACADEMY LAKES HIGH SCHOOL | 1,201 | regular | high |
| MATER ACADEMY LAKES MIDDLE SCHOOL | 870 | regular | middle |
| MATER ACADEMY NARCOOSSEE | 1,096 | regular | elementary |
| MATER ACADEMY OF INTERNATIONAL STUDIES | 465 | regular | elementary |
| Mater Academy of Northern Nevada | 501 | regular | elementary |
| Mater Bonanza | 1,113 | regular | other |
| MATER BRICKELL ACADEMY HIGH | 487 | regular | high |
| MATER BRICKELL ACADEMY MIDDLE | 525 | regular | middle |