| Belmont Ridge Middle School | Virginia | 6-8 | Suburban |
| Benjamin Tasker Middle School | Maryland | | Suburban |
| Blake Bass Middle School | Georgia | 6-8 | Rural |
| Cloverleaf Middle School | Ohio | 6-8 | Rural |
| Custer Baker Intermediate School | Indiana | 5-6 | Suburban |
| Eagle Ridge Middle School | Virginia | | Suburban |
| Farmwell Station Middle School | Virginia | 6-8 | Suburban |
| Greenwood College School | Ontario | 7-12 | Urban |
| Marshall Middle School | Pennsylvania | 6-8 | Suburban |
| New Hope-Solebury Middle School | Pennsylvania | 6-8 | Suburban |
| Oceanside Middle School | New York | 7-8 | Suburban |
| Phoenix Middle School | Ohio | 7-8 | Suburban |
| Sheridan School | District of Columbia | K-8 | Urban |
| Trafalgar School for Girls | Québec | 7-11 | Urban |
| Watson Mountain Middle School | Virginia | 6-8 | Suburban |
| Willard Middle School | Virginia | 6-8 | Suburban |
| Woodmere Middle School | New York | 6-8 | Suburban |