| Abbreviation | Definition |
|---|---|
| HAP | Homework Accountability Program |
| HAPPEN | Healthcare Associates Providing Positive Education and Networking |
| HARE | Houserabbit Adoption Rescue and Education |
| HARPA | Harvard College Observatory Papers |
| HASSE | Houston Association for Space and Science Education |
| HASSP | Home And School Support Project |
| HASTA | Hopeful Aware Students Taking Action |
| HAT | Homework And Teachers |
| HATC | Houston Area Teacher Center |
| HATE | Have All The Education |
| HATS | Helping Adolescents To Succeed |
| HATS | High Achieving Talented Students |
| HAVEN | Home And Values Educational Network |
| HAW | Homework A Waiting |
| HAWK | Help Acquire the World's Knowledge |
| HAWK | Homeschoolers of Annapolis and West Kings |
| HAWK | Huge Awesome Week for Kids |
| HB | held back |
| HBE | Home Buyer Education |
| HBEC | Health Benefits Education Campaign |