Ebbinghaus' forgetting curve and review cycle.

Learning “Myth” #1: Ebbinghaus Forgetting Curve

Overcoming the Ebbinghaus Effect–How soon we forget - E-Learning Council

The Forgetting Curve and its implications for training delivery - TrainingZone

Teaching and Learning Strategies - What Everyone Should Know

Ebbinghaus's Forgetting Curve - Why We Keep Forgetting and What We Can Do About It

An Annotated Forgetting Curve

Replication and Analysis of Ebbinghaus' Forgetting Curve

What is the forgetting curve? How do you use it to improve your memory? - Quora

What is the forgetting curve? How do you use it to improve your memory? - Quora