| Cook County SD 130, IL (District) |
| Cooke City Elem, MT (District) |
| Cooke County, TX (ISD) |
| Coolidge ISD, TX (District) |
| Coolidge Unified District, AZ (District) |
| Coon Rapids-Bayard Comm School District, IA (District) |
| Coop Assoc for Spec Educ, IL (District) |
| Cooper Co. R-Iv, MO (District) |
| Cooper County, MO (ISD) |
| Cooper ISD, TX (District) |
| Cooper School Department, ME (District) |
| Cooperative Educational Services, CT (District) |
| Cooperstown Central School District, NY (District) |
| Coopersville Area Public School District, MI (District) |
| Coos Bay Sd 9, OR (District) |
