The method is quite simple: Write down the concept or problem you want to understand at the top of a piece of paper. In the space below, explain the idea as if you had to teach it to someone else. If it’s a concept, ask yourself how you would convey the idea to someone who has never heard of it before. If it’s a problem, explain how to solve it and—crucially—why that solution procedure makes sense to you. When you get stuck, meaning your understanding fails to provide a clear answer, go back to your book, notes, teacher, or reference material to find the answer.
