| Aliamanu Middle School | Hawaii | 7-8 | Suburban |
| Beach Street Middle School | New York | 6-8 | Suburban |
| Cave Spring Middle School | Virginia | 6-8 | Suburban |
| Central Middle School | Georgia | 6-8 | Rural |
| Custer Baker Intermediate School | Indiana | 5-6 | Suburban |
| Ewa Makai Middle School | Hawaii | 6-8 | Suburban |
| Gemini Middle School | Illinois | 6-8 | Suburban |
| Gum Spring Middle School | Virginia | 6-8 | Suburban |
| 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 |
| Mattoon Middle School | Illinois | 6-8 | Rural |
| Moanalua Middle School | Hawaii | 7-8 | Suburban |
| Phoenix Middle School | Ohio | 7-8 | Suburban |
| R.L. Stevenson Middle School | Hawaii | 6-8 | Urban |
| Readington Middle School | New Jersey | 6-8 | Suburban |
| 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 Orangetown Middle School | New York | 6-8 | Suburban |
| Tomahawk Creek Middle School | Virginia | 6-8 | Suburban |
| Willard Middle School | Virginia | 6-8 | Suburban |
| Wisdom Lane Middle School | New York | 6-8 | Suburban |
| Woodstock Union Middle School | Vermont | 7-8 | Rural |