| Beach Street Middle School | New York | 6-8 | Suburban |
| Central Middle School | Georgia | 6-8 | Rural |
| Chouteau Middle School | Oklahoma | 5-8 | Rural |
| Farmwell Station Middle School | Virginia | 6-8 | Suburban |
| Gemini Middle School | Illinois | 6-8 | Suburban |
| Gilbert Middle School | Iowa | 6-8 | Suburban |
| JL Simpson Middle School | Virginia | 6-8 | Suburban |
| Kamehameha Schools | Hawaii | 7-8 | Urban |
| Lunsford Middle School | Virginia | 6-8 | Suburban |
| Madison Country Day School | Wisconsin | PreK-12 | Rural |
| Mattawan Middle School | Michigan | 6-8 | Rural |
| Mayfield Middle School | Ohio | 6-8 | Suburban |
| Moanalua Middle School | Hawaii | 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 |
| Seneca Ridge Middle School | Virginia | 6-8 | Suburban |
| South Orangetown Middle School | New York | 6-8 | Suburban |
| Tomahawk Creek Middle School | Virginia | 6-8 | Suburban |
| 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 |
| Woodstock Union Middle School | Vermont | 7-8 | Rural |