| Abbreviation | Definition |
|---|---|
| CRLS | Cambridge Rindge and Latin School |
| CRMS | Calkins Road Middle School |
| CRMS | Camden Rockport Middle School |
| CRMS | Canyon Ridge Middle School |
| CRMS | Castle Rock Middle School |
| CRMS | Cedar River Middle School |
| CRMS | Chestnut Ridge Middle School |
| CRMS | Coal Ridge Middle School |
| CRMS | Colorado Rocky Mountain School |
| CRMS | Coon Rapids Middle School |
| CRMS | Crystal River Middle School |
| CRS | Canyon Ridge School |
| CRSD | Cedar Ridge School District |
| CRSD | Chestnut Ridge School District |
| CRSD | Copper River School District |
| CRSD | Council Rock School Distirct |
| CRSHS | Regional Science High School |
| CRSI | Cardus Religious School Initiative |
| CRSI | Cardus Religious Schools Initiative |
| CRSS | Cannon River STEM School |