| Aliamanu Middle School | Hawaii | 7-8 | Suburban |
| Ashland-Greenwood Middle School | Nebraska | 6-8 | Rural |
| Beach Street Middle School | New York | 6-8 | Suburban |
| Benjamin Tasker Middle School | Maryland | | Suburban |
| Blake Bass Middle School | Georgia | 6-8 | Rural |
| Cave Spring Middle School | Virginia | 6-8 | Suburban |
| Central Middle School | Georgia | 6-8 | Rural |
| Cloverleaf Middle School | Ohio | 6-8 | Rural |
| Coastal Middle School | Georgia | 6-8 | Suburban |
| Corbett Preparatory School of IDS | Florida | PreK-8 | Suburban |
| Custer Baker Intermediate School | Indiana | 5-6 | Suburban |
| Eagle Ridge Middle School | Virginia | | Suburban |
| Ewa Makai Middle School | Hawaii | 6-8 | Suburban |
| Franklin Avenue Middle School | New Jersey | 6-8 | Suburban |
| Gemini Middle School | Illinois | 6-8 | Suburban |
| Greenwood College School | Ontario | 7-12 | Urban |
| Gum Spring Middle School | Virginia | 6-8 | Suburban |
| Hudson Middle School | Ohio | 6-8 | Suburban |
| Indian Creek Middle School | Indiana | 6-8 | Rural |
| JL Simpson Middle School | Virginia | 6-8 | Suburban |
| Kaimukī Middle School | Hawaii | 6-8 | Suburban |
| Lunsford Middle School | Virginia | 6-8 | Suburban |
| Marshall Middle School | Pennsylvania | 6-8 | Suburban |
| Mattoon Middle School | Illinois | 6-8 | Rural |
| Moanalua Middle School | Hawaii | 7-8 | Suburban |
| New Hope-Solebury Middle School | Pennsylvania | 6-8 | Suburban |
| Pahoa High and Intermediate School | Hawaii | 7-12 | Rural |
| Phoenix Middle School | Ohio | 7-8 | Suburban |
| R.L. Stevenson Middle School | Hawaii | 6-8 | Urban |
| Readington Middle School | New Jersey | 6-8 | Suburban |