Schools
| Name | Category | Notes |
|---|---|---|
| Amersham Hall School | Other Private | |
| Amery Hill School | Comprehensive | Alton. |
| Amman Valley Grammar School | Grammar | |
| Ampleforth College | Public | |
| Anderson Institute | Miscellaneous | Lerwick. |
| Andrew Cairns Secondary Modern | Secondary Modern | Littlehampton. |
| Annadale Grammar School | Grammar | |
| Annan Academy | Miscellaneous | |
| Anniesland College | FE College | Glasgow. |
| Appleby Grammar School | Grammar | Westmorland. |
| Apsley Grammar School | Grammar | Hemel Hempstead. |
| Arbroath High School | Grammar | |
| Archbishop Holgate's Grammar School | Public | |
| Ardingly College | Other Private | Brighton. |
| Ardrossan Academy | Grammar | |
| Ardwyn Grammar School | Grammar | Aberystwyth. |
| Armagh College of Further and Higher Education | FE College | Merged with two other FE colleges in 2007 to become Southern Regional College. |
| Armagh Royal School | Other Private | |
| Armstrong College, Newcastle-upon-Tyne | Other Private | |
| Arnold House School, London | Public |