| Name | City | St. | Country | Clubs | Update |
| Aberdeen High | Aberdeen | Maryland | | | 01-01-2002 |
| Aberdeen High School | Aberdeen | Mississippi | | | 01-01-2002 |
| Abiding Faith Christian School | Crossett | Arkansas | | | 01-01-2002 |
| Abiding Savior Lutheran School | Lake Forest | California | | | 01-01-2002 |
| Abiding Word Lutheran School | Houston | Texas | | | 01-01-2002 |
| Abilene Christian School | Abilene | Texas | | | 01-01-2002 |
| Abilene Christian University | Abilene | Texas | | clubs | 01-02-2001 |
| Abilene H S | Abilene | Texas | | | 01-01-2002 |
| Abilene High School | Abilene | Kansas | | | 01-01-2002 |
| Ability Plus School | Tustin | California | | | 07-21-2008 |
| Abingdon High | Abingdon | Virginia | | | 01-01-2002 |
| Abington Friends School | Jenkintown | Pennsylvania | | | 01-01-2002 |
| Abington Heights HS | Clarks Summit | Pennsylvania | | | 01-01-2002 |
| Abington High | Abington | Massachusetts | | | 01-01-2002 |
| Abington SHS | Abington | Pennsylvania | | | 01-01-2002 |
| Abintra Montessori School | Nashville | Tennessee | | | 01-01-2002 |
| Abp Ryan High School | Philadelphia | Pennsylvania | | | 01-01-2002 |
| Abraham Baldwin Agricultural College | Tifton | Georgia | | | 01-02-2001 |
| Abraham Clark High | Roselle | New Jersey | | | 01-01-2002 |
| Abraham Joshua Heschel Day Sch | Northridge | California | | | 01-01-2002 |
