| Aliamanu Middle School | Hawaii | 7-8 | Suburban |
| Central Middle School | Georgia | 6-8 | Rural |
| Custer Baker Intermediate School | Indiana | 5-6 | Suburban |
| Dorseyville Middle School | Pennsylvania | 6-8 | Suburban |
| Ewa Makai Middle School | Hawaii | 6-8 | Suburban |
| Gemini Middle School | Illinois | 6-8 | Suburban |
| Girls Preparatory School | Tennessee | 6-12 | Urban |
| Greenbrier Middle School | Arkansas | 6-7 | Rural |
| Hudson Middle School | Ohio | 6-8 | Suburban |
| JL Simpson Middle School | Virginia | 6-8 | Suburban |
| Kaimukī Middle School | Hawaii | 6-8 | Suburban |
| Lunsford Middle School | Virginia | 6-8 | Suburban |
| Madison Country Day School | Wisconsin | PreK-12 | Rural |
| Mattawan Middle School | Michigan | 6-8 | Rural |
| Mattoon Middle School | Illinois | 6-8 | Rural |
| McCulloch Intermediate School | Texas | 5-6 | Suburban |
| Moanalua Middle School | Hawaii | 7-8 | Suburban |
| Phoenix Middle School | Ohio | 7-8 | Suburban |
| R.L. Stevenson Middle School | Hawaii | 6-8 | Urban |
| Ridgedale Middle School | New Jersey | 6-8 | Suburban |
| Seneca Ridge Middle School | Virginia | 6-8 | Suburban |
| Seven Hills School | Virginia | 5-8 | Urban |
| Sheridan School | District of Columbia | K-8 | Urban |
| South View Middle School | Minnesota | 6-8 | Suburban |
| Tybee Island Maritime Academy | Georgia | K-8 | Suburban |
| Udall Road Middle School | New York | 6-8 | Suburban |
| Watertown Middle School | South Dakota | 7-8 | Rural |
| Willard Middle School | Virginia | 6-8 | Suburban |
| Wisdom Lane Middle School | New York | 6-8 | Suburban |
| Woodstock Union Middle School | Vermont | 7-8 | Rural |