| A | B |
| Accomodation | learning by changing existing knowledge structures |
| Acculturation | Blending a native culture with a new culture, keeping elements of both |
| Adhere | To hold closely or firmly |
| Adolescence | A transitional period of physical and psychological development beginning around 11-13 years, extending through the teenage years |
| Advance Organizer | Structure providing a preview of the upcoming lesson |
| Advocate | To support or promote |
| Affect | To change |
| Affective domain | feelings, emotions, values, and attitudes |
| Analogy | A logical comparison inferring that if two things are known to be alike in some ways, then they must be alike in other ways |
| Assimilation | Learning by adding new knowledge to existing knowledge |