| Ashland-Greenwood Middle School | Nebraska | 6-8 | Rural |
| Belmont Ridge Middle School | Virginia | 6-8 | Suburban |
| Benjamin Tasker Middle School | Maryland | | Suburban |
| Blake Bass Middle School | Georgia | 6-8 | Rural |
| Brambleton Middle School | Virginia | 6-8 | Suburban |
| Cave Spring Middle School | Virginia | 6-8 | Suburban |
| Central Middle School | Georgia | 6-8 | Rural |
| Cloverleaf Middle School | Ohio | 6-8 | Rural |
| Crayton Middle School | South Carolina | 6-8 | Urban |
| Custer Baker Intermediate School | Indiana | 5-6 | Suburban |
| Douglas Middle School | Wyoming | 6-8 | Rural |
| Eagle Ridge Middle School | Virginia | | Suburban |
| Elwood Middle School | New York | 6-8 | Suburban |
| Farmwell Station Middle School | Virginia | 6-8 | Suburban |
| Franklin Avenue Middle School | New Jersey | 6-8 | Suburban |
| Gemini Middle School | Illinois | 6-8 | Suburban |
| Gilbert Middle School | Iowa | 6-8 | Suburban |
| Greenwood College School | Ontario | 7-12 | Urban |
| Gum Spring Middle School | Virginia | 6-8 | Suburban |
| Hudson Middle School | Ohio | 6-8 | Suburban |
| ʻĪao Intermediate School | Hawaii | 6-8 | Suburban |
| JL Simpson Middle School | Virginia | 6-8 | Suburban |
| Kaimukī Middle School | Hawaii | 6-8 | Suburban |
| Kamehameha Schools | Hawaii | 7-8 | Urban |
| Learning Community Charter School | New Jersey | PreK-8 | Urban |
| Lee County Middle School West | Georgia | 6-8 | Rural |
| 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 |