| Belmont Ridge Middle School | Virginia | 6-8 | Suburban |
| Cave Spring Middle School | Virginia | 6-8 | Suburban |
| Central Middle School | Georgia | 6-8 | Rural |
| Crayton Middle School | South Carolina | 6-8 | Urban |
| Farmwell Station Middle School | Virginia | 6-8 | Suburban |
| Gemini Middle School | Illinois | 6-8 | Suburban |
| Gilbert Middle School | Iowa | 6-8 | Suburban |
| Greenbrier Middle School | Arkansas | 6-7 | Rural |
| Gum Spring Middle School | Virginia | 6-8 | Suburban |
| JL Simpson Middle School | Virginia | 6-8 | Suburban |
| Lunsford Middle School | Virginia | 6-8 | Suburban |
| Mattawan Middle School | Michigan | 6-8 | Rural |
| Mayfield Middle School | Ohio | 6-8 | Suburban |
| Phoenix Middle School | Ohio | 7-8 | Suburban |
| Ridgedale Middle School | New Jersey | 6-8 | Suburban |
| Seneca Ridge Middle School | Virginia | 6-8 | Suburban |
| Sheridan School | District of Columbia | K-8 | Urban |
| Smart’s Mill Middle School | Virginia | 6-8 | Suburban |
| South Orangetown Middle School | New York | 6-8 | Suburban |
| South View Middle School | Minnesota | 6-8 | 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 |
| Winston Campus Jr. High School | Illinois | 7-8 | Suburban |
| Woodstock Union Middle School | Vermont | 7-8 | Rural |