| Abbreviation | Definition |
|---|---|
| AGEP | Association Genevoise des Ecoles Privées |
| AGGS | Anglican Girls Grammar School |
| AGGS | Auckland Girls Grammar School |
| AGIS | Avon Grove Intermediate School |
| AGMA | American Girl Modeling Academy |
| AGMS | Alexander Graham Middle School |
| AGMS | Antonio Gonzalez Middle School |
| AGMS | Azalea Gardens Middle School |
| AGOS | Air Ground Operations School |
| AGS | Aberdeen Grammar School |
| AGS | Abuja Graduate School |
| AGS | American Graduate School |
| AGS | Appleby Grammar School |
| AGS | Arkansas Governor's School |
| AGS | Atlanta Girls School |
| AGSA | Alliance of Girls' Schools Australasia |
| AGSB | Altrincham Grammar School for Boys |
| AGSB | American Graduate School of Business |
| AGSB | Ateneo Graduate School of Business |
| AGSD | Alaska Gateway School District |