| Ashland-Greenwood Middle School | Nebraska | 6-8 | Rural |
| Belmont Ridge Middle School | Virginia | 6-8 | Suburban |
| Benjamin Tasker Middle School | Maryland | | Suburban |
| Central Middle School | Georgia | 6-8 | Rural |
| Cloverleaf Middle School | Ohio | 6-8 | Rural |
| Corbett Preparatory School of IDS | Florida | PreK-8 | Suburban |
| Custer Baker Intermediate School | Indiana | 5-6 | Suburban |
| Dorseyville Middle School | Pennsylvania | 6-8 | Suburban |
| Douglas Middle School | Wyoming | 6-8 | Rural |
| Greenbrier Middle School | Arkansas | 6-7 | Rural |
| Greenwood College School | Ontario | 7-12 | Urban |
| Gum Spring Middle School | Virginia | 6-8 | Suburban |
| Hidden Valley Middle School | Virginia | 6-8 | Suburban |
| Kamehameha Schools | Hawaii | 7-8 | Urban |
| Madison Country Day School | Wisconsin | PreK-12 | Rural |
| Marshall Middle School | Pennsylvania | 6-8 | Suburban |
| New Hope-Solebury Middle School | Pennsylvania | 6-8 | Suburban |
| Phoenix Middle School | Ohio | 7-8 | Suburban |
| Smyrna Middle School | Tennessee | 6-8 | Suburban |
| South View Middle School | Minnesota | 6-8 | Suburban |
| Trafalgar School for Girls | Québec | 7-11 | Urban |
| Willard Middle School | Virginia | 6-8 | Suburban |