The National Training Laboratories Institute developed a pyramid model to represent the retention rate of information. Richard Feynman taught himself advanced mathematics in his teens and would go on to earn a BS from the Massachusetts Institute of Technology and a PhD from Princeton University. The two key takeaways from the pyramid, one, lecture and reading are not enough, and two, teaching is the most powerful form of learning.
The Learning Pyramid indicates that teaching is a much more effective driver of retention than reading or lecture. The goal should be to move rapidly to teaching in order to cement new learning.
The Feynman Technique is a learning model that leverages teaching and prioritizes simplicity to help you develop a deep understanding of any topic.
The four key steps of the Feynman Technique: (1) Set the Stage, (2) ELI5, (3) Assess & Study, and (4) Organize, Convey, & Review.