| Custer Baker Intermediate School | Indiana | 5-6 | Suburban |
| Dorseyville Middle School | Pennsylvania | 6-8 | Suburban |
| Douglas Middle School | Wyoming | 6-8 | Rural |
| Farmwell Station Middle School | Virginia | 6-8 | Suburban |
| Gilbert Middle School | Iowa | 6-8 | Suburban |
| JL Simpson Middle School | Virginia | 6-8 | Suburban |
| Kamehameha Schools | Hawaii | 7-8 | Urban |
| Lee County Middle School East | Georgia | 6-8 | Rural |
| Marietta Sixth Grade Academy | Georgia | 6 | Suburban |
| Mattawan Middle School | Michigan | 6-8 | Rural |
| Mayfield Middle School | Ohio | 6-8 | Suburban |
| McCulloch Intermediate School | Texas | 5-6 | Suburban |
| Oceanside Middle School | New York | 7-8 | Suburban |
| R.L. Stevenson Middle School | Hawaii | 6-8 | Urban |
| Ridgeview Charter Middle School | Georgia | 6-8 | Suburban |
| River Bend Middle School | Virginia | 6-8 | Suburban |
| Upson-Lee Middle School | Georgia | 6-8 | Rural |
| Watertown Middle School | South Dakota | 7-8 | Rural |