| Abbreviation | Definition |
|---|---|
| CRSS | Center for Reform of School Systems |
| CS | Carpenter's School |
| CS | Cavitt School |
| CS | Code of the School |
| CS | Comprehensive School |
| CSA | Cheer Star Academy |
| CSAB | Charter Schools Advisory Board |
| CSAD | Cardiff School of Art Design |
| CSAD | Cleveland School of Architecture and Design |
| CSAG | CornerStone Academy of Glenwood |
| CSAH | Children's Achool of Art Houston |
| CSAL | Catholic Schools Athletic League |
| CSAL | Charter School Athletic League |
| CSAP | Colorado School Assessment Program |
| CSAP | Comprehensive School Assistance Program |
| CSAS | Chattanooga School for the Arts and Sciences |
| CSAT | Charter School for Applied Technologies |
| CSB | California School for the Blind |
| CSB | Connecticut School of Broadcasting |
| CSBC | Catholic Schools of Broome County |