Through his memory loss experiments, Ebbinghaus plotted a graph that showed his memory loss over time when recalling lists of made-up words. This graph became known as the Ebbinghaus Curve or the Forgetting Curve. Since then, others have expanded on his work and researched how to mitigate this curve.
Some ways to address the factors that contribute to memory loss include reviewing key concepts, relating information to real-world examples, effective communication of information, and how we feel about what we're learning.