| Aiea Intermediate School | Hawaii | 7-8 | Suburban |
| Ashland-Greenwood Middle School | Nebraska | 6-8 | Rural |
| Beach Street Middle School | New York | 6-8 | Suburban |
| Belmont Ridge Middle School | Virginia | 6-8 | Suburban |
| Benjamin Tasker Middle School | Maryland | | Suburban |
| Blake Bass Middle School | Georgia | 6-8 | Rural |
| Central Middle School | Georgia | 6-8 | Rural |
| Chouteau Middle School | Oklahoma | 5-8 | Rural |
| Cloverleaf Middle School | Ohio | 6-8 | Rural |
| Custer Baker Intermediate School | Indiana | 5-6 | Suburban |
| Dorseyville Middle School | Pennsylvania | 6-8 | Suburban |
| Eagle Ridge Middle School | Virginia | | Suburban |
| Gemini Middle School | Illinois | 6-8 | Suburban |
| Greenwood College School | Ontario | 7-12 | Urban |
| JL Simpson Middle School | Virginia | 6-8 | Suburban |
| Marshall Middle School | Pennsylvania | 6-8 | Suburban |
| McCulloch Intermediate School | Texas | 5-6 | Suburban |
| New Hope-Solebury Middle School | Pennsylvania | 6-8 | Suburban |
| Phoenix Middle School | Ohio | 7-8 | Suburban |
| Sayville Middle School | New York | 6-8 | Suburban |
| Seaford Middle School | New York | 6-8 | Suburban |
| Seneca Ridge Middle School | Virginia | 6-8 | Suburban |
| Smyrna Middle School | Tennessee | 6-8 | Suburban |
| Trafalgar School for Girls | Québec | 7-11 | Urban |
| Udall Road Middle School | New York | 6-8 | Suburban |
| Willard Middle School | Virginia | 6-8 | Suburban |
| Winston Campus Jr. High School | Illinois | 7-8 | Suburban |
| Woodmere Middle School | New York | 6-8 | Suburban |
| York Suburban Middle School | Pennsylvania | 6-8 | Suburban |