| Abbreviation | Definition |
|---|---|
| CJDS | Cutler Jewish Day School |
| CJH | Canyon Junior High |
| CJHS | Caledonia Junior High School |
| CJHS | Carl Junction High School |
| CJHS | Chicagoland Jewish High School |
| CJHS | Cornwallis Junior High School |
| CJP | Charlotte Jewish Preschool |
| CJSD | Clarkdale Jerome School District |
| CJSS | Canberra Japanese Supplementary School |
| CJTS | Connecticut Juvenile Training School |
| CKHS | Central Kitsap High School |
| CKHS | Chembur Karnatak High School |
| CKS | Christ the King School |
| CKTS | Carol Kristian Theatre School |
| CL | Class List |
| CLAS | Council for Leaders in Alabama Schools |
| CLASS | Christian Liberty Academy Satellite School |
| CLASS | Computer Literacy And Studies in Schools |
| CLC | Creative Learning Center |
| CLC | Crystal Lake Central |