Reading: The Forgetting Curve
We know that forgetting is a problem - we all do it. Read this to understand how it works and why you need better strategies.
This document serves as a great conversation starter to teaching a mini-lesson about why we need to learn smarter. Save it and print it out as a handout. Change your instructional strategies to adjust to this new insight.
For teens, you can use it as a starting point for an independent learning project.