- ACT-R (John Anderson)
- Adult Learning Theory (P. Cross)
- Algo-Heuristic Theory (L. Landa)
- Andragogy (Malcolm Knowles)
- Anchored Instruction (John Bransford)
- Aptitude-Treatment Interaction (L. Cronbach & R. Snow)
- Attribution Theory (B. Weiner)
- Cognitive Dissonance Theory (L. Festinger)
- Cognitive Flexibility Theory (R. Spiro)
- Cognitive Load Theory (J. Sweller)
- Component Display Theory (M. David Merrill)
- Conditions of Learning (Robert Gagne)
- Connectionism (Edward Thorndike)
- Constructivist Theory (Jerome Bruner)
- Contiguity Theory (Edwin Guthrie)
- Conversation Theory (Gordon Pask)
- Criterion Referenced Instruction (Robert Mager)
- Double Loop Learning (C. Argyris)
- Drive Reduction Theory (C. Hull)
- Dual Coding Theory (A. Paivio)