The Feynman technique: explain, check and revise

You have read a chapter, then someone asks you to explain it. You can remember the terms but struggle to connect them. An explanation exercise gives you something concrete to check.

The Feynman technique is a way to practise explaining and revising an idea. Pick one concept, explain it in your own words, compare it with a reliable source and try again. Use it for course material, a certification topic or a process you need to explain at work.

What explanation practice can show

Chi and colleagues' 1994 study found learning gains from prompted self-explanations while students studied a biology text.

Bisra and colleagues' 2018 meta-analysis found average benefits from self-explanation prompts across varied learning tasks.

These findings concern self-explanation, rather than establishing that a particular five-step Feynman routine works for everyone. A fluent explanation can still be wrong. A pause can mean a missing word, an unfamiliar audience or an idea that needs more work; it does not automatically prove a knowledge gap.

Try an explanation-and-check cycle

1. Choose one concept and a specific audience. Decide what the explanation should help them understand or do.
2. Explain it aloud, in writing or with a diagram. Define necessary technical terms rather than removing them all.
3. Mark uncertain links, unsupported statements and places where you cannot explain why something happens.
4. Check those points against a reliable source, worked example or feedback from someone qualified. Correct errors and note important limits.
5. Explain the revised version. Then try an application question or relevant task to check more than your ability to describe it.

For a procedure, explain why each step is needed. For a theorem, state the conditions under which it applies. Match the explanation to the task and keep relevant details, even when the language is simple.

Keep the explanation accurate

You do not have to address a five-year-old. A beginner in your subject or a colleague from another team may be a more useful audience. Analogies can help introduce an idea, but say where the comparison stops working.

Set a manageable time for the exercise and seek help if you keep getting stuck. The task does not have a guaranteed duration, and speaking is not always better than writing. Revisit the idea later or practise its application when that fits your goal.

If you use Piply to draft an explanation or questions, check the output against your material. Use the revised explanation and the task result to choose what to study next.