| Belmont Ridge Middle School | Virginia | 6-8 | Suburban |
| Central Middle School | Georgia | 6-8 | Rural |
| Custer Baker Intermediate School | Indiana | 5-6 | Suburban |
| Dorseyville Middle School | Pennsylvania | 6-8 | Suburban |
| Greenbrier Middle School | Arkansas | 6-7 | Rural |
| Gum Spring Middle School | Virginia | 6-8 | Suburban |
| Hidden Valley Middle School | Virginia | 6-8 | Suburban |
| Kamehameha Schools | Hawaii | 7-8 | Urban |
| Lee County Middle School East | Georgia | 6-8 | Rural |
| Madison Country Day School | Wisconsin | PreK-12 | Rural |
| Phoenix Middle School | Ohio | 7-8 | Suburban |
| Smyrna Middle School | Tennessee | 6-8 | Suburban |
| South View Middle School | Minnesota | 6-8 | Suburban |
| Willard Middle School | Virginia | 6-8 | Suburban |