| Aliamanu Middle School | Hawaii | 7-8 | Suburban |
| Brambleton Middle School | Virginia | 6-8 | Suburban |
| Cave Spring Middle School | Virginia | 6-8 | Suburban |
| Dorseyville Middle School | Pennsylvania | 6-8 | 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 |
| Gum Spring Middle School | Virginia | 6-8 | Suburban |
| Hudson Middle School | Ohio | 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 |
| 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 |
| Mayfield Middle School | Ohio | 6-8 | Suburban |
| Moanalua Middle School | Hawaii | 7-8 | 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 |
| Schoenbar Middle School | Alaska | 7-8 | Rural |
| South Orangetown Middle School | New York | 6-8 | Suburban |
| South View Middle School | Minnesota | 6-8 | Suburban |
| Watertown Middle School | South Dakota | 7-8 | Rural |
| Willard Middle School | Virginia | 6-8 | Suburban |
| Winston Campus Jr. High School | Illinois | 7-8 | Suburban |