| Central Middle School | Georgia | 6-8 | Rural |
| Chouteau Middle School | Oklahoma | 5-8 | Rural |
| Coastal Middle School | Georgia | 6-8 | Suburban |
| Crayton Middle School | South Carolina | 6-8 | Urban |
| Custer Baker Intermediate School | Indiana | 5-6 | Suburban |
| Farmwell Station Middle School | Virginia | 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 |
| Kamehameha Schools | Hawaii | 7-8 | Urban |
| Marietta Sixth Grade Academy | Georgia | 6 | Suburban |
| Mattawan Middle School | Michigan | 6-8 | Rural |
| Mayfield Middle School | Ohio | 6-8 | Suburban |
| Moanalua Middle School | Hawaii | 7-8 | Suburban |
| R.L. Stevenson Middle School | Hawaii | 6-8 | Urban |
| River Bend Middle School | Virginia | 6-8 | Suburban |
| Seneca Ridge Middle School | Virginia | 6-8 | Suburban |
| Smyrna Middle School | Tennessee | 6-8 | Suburban |
| South View Middle School | Minnesota | 6-8 | Suburban |
| Tomahawk Creek Middle School | Virginia | 6-8 | Suburban |
| Willard Middle School | Virginia | 6-8 | Suburban |
| Winston Campus Jr. High School | Illinois | 7-8 | Suburban |