| Conroe ISD, TX (District) |
| Cons HSD 230, IL (District) |
| Conservatory Lab Charter (District), MA (District) |
| Constantine Public School District, MI (District) |
| Constellation Schools: Eastside Arts Academy, OH (PSA) |
| Constellation Schools: Elyria Community, OH (PSA) |
| Constellation Schools: Lorain Community Elementary, OH (PSA) |
| Constellation Schools: Lorain Community Middle, OH (PSA) |
| Constellation Schools: Madison Community Elementary, OH (PSA) |
| Constellation Schools: Old Brooklyn Community Elementary, OH (PSA) |
| Constellation Schools: Old Brooklyn Community Middle, OH (PSA) |
| Constellation Schools: Parma Community, OH (PSA) |
| Constellation Schools: Puritas Community Elementary, OH (PSA) |
| Constellation Schools: Puritas Community Middle, OH (PSA) |
| Constellation Schools: Stockyard Community Elementary, OH (PSA) |
