Memory is a key concept in cognitive theories of learning: without memory, no learning can take place.

Psychologists generally agree on three major components of memory:

• sensory memory
• short-term (working) memory
• long-term memory

though different models view each in different ways. 

Atkinson and Shiffrin's 1968 model provides the benchmark:

1. Play: Short and long-term memory
2. Read and reflect: Amnesia
3. Read more: Richard Dewey on the biology of memory