| Ashland-Greenwood Middle School | Nebraska | 6-8 | Rural |
| Beach Street Middle School | New York | 6-8 | Suburban |
| Benjamin Tasker Middle School | Maryland | | Suburban |
| Cloverleaf Middle School | Ohio | 6-8 | Rural |
| Corbett Preparatory School of IDS | Florida | PreK-8 | Suburban |
| Custer Baker Intermediate School | Indiana | 5-6 | Suburban |
| Farmwell Station Middle School | Virginia | 6-8 | Suburban |
| Girls Preparatory School | Tennessee | 6-12 | Urban |
| Greenwood College School | Ontario | 7-12 | Urban |
| ʻĪao Intermediate School | Hawaii | 6-8 | Suburban |
| JL Simpson Middle School | Virginia | 6-8 | Suburban |
| Laveen Elementary School | Arizona | PreK-8 | Urban |
| Mattawan Middle School | Michigan | 6-8 | Rural |
| New Hope-Solebury Middle School | Pennsylvania | 6-8 | Suburban |
| Oceanside Middle School | New York | 7-8 | Suburban |
| Phoenix Middle School | Ohio | 7-8 | Suburban |
| R.L. Stevenson Middle School | Hawaii | 6-8 | Urban |
| Readington Middle School | New Jersey | 6-8 | Suburban |
| Ridgedale Middle School | New Jersey | 6-8 | Suburban |
| Seaford Middle School | New York | 6-8 | Suburban |
| Trafalgar School for Girls | Québec | 7-11 | Urban |
| Udall Road Middle School | New York | 6-8 | Suburban |
| Valley View Middle School | New Jersey | 5-8 | Suburban |
| Walworth Barbour American International School | | 6-8 | International |
| Watertown Middle School | South Dakota | 7-8 | Rural |
| Willard Middle School | Virginia | 6-8 | Suburban |
| Woodmere Middle School | New York | 6-8 | Suburban |
| Woodstock Union Middle School | Vermont | 7-8 | Rural |