| Aliamanu Middle School | Hawaii | 7-8 | Suburban |
| 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 |
| Cloverleaf Middle School | Ohio | 6-8 | Rural |
| Corbett Preparatory School of IDS | Florida | PreK-8 | Suburban |
| Dorseyville Middle School | Pennsylvania | 6-8 | Suburban |
| Douglas Middle School | Wyoming | 6-8 | Rural |
| Eagle Ridge Middle School | Virginia | | Suburban |
| Elwood Middle School | New York | 6-8 | Suburban |
| Ewa Makai Middle School | Hawaii | 6-8 | Suburban |
| Farmwell Station Middle School | Virginia | 6-8 | Suburban |
| Gemini Middle School | Illinois | 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 East | Georgia | 6-8 | Rural |
| Lee County Middle School West | Georgia | 6-8 | Rural |
| Madison Country Day School | Wisconsin | PreK-12 | Rural |
| Marietta Sixth Grade Academy | Georgia | 6 | Suburban |
| Mattawan Middle School | Michigan | 6-8 | Rural |
| Mattoon Middle School | Illinois | 6-8 | Rural |