| Abbreviation | Definition |
|---|---|
| CGS | Costeas Geitonas School |
| CGSB | Chatham Grammar School for Boys |
| CGSB | Curtin Graduate School of Business |
| CGSI | Cambridge Green Schools Initiative |
| CGSI | Carroll Gardens School for Innovation |
| CGSS | Cedar Girls Secondary School |
| CGSS | Clean Green and Safe Schools |
| CGSS | Command and General Staff School |
| CGST | Caribbean Graduate School of Theology |
| CGST | China Graduate School of Theology |
| CGST | Columbia Gorge School of Theatre |
| ch | child, children |
| CHASS | Conference of Heads of Assisted Secondary Schools |
| CHCCS | Coffs Harbour Christian Community School |
| CHDS | Capitol Hill Day School |
| CHDS | Cincinnati Hebrew Day School |
| CHES | Cayuga Heights Elementary School |
| CHES | Centennial Hylands Elementary School |
| CHES | Cumberland heights elementary school |
| CHGS | Cambridge House Grammar School |