The Feynman Technique: Learn Anything by Explaining It Simply

The Feynman technique is a learning method named after the physicist Richard Feynman, who was famous for explaining complex ideas in clear, everyday language. The principle is simple: try to explain something as if to a beginner, and the places where you get stuck show you exactly what you do not yet understand.

It works for exam topics, technical skills at work, or any subject you want to genuinely understand rather than memorise.

The four steps

1. Choose a concept and write its name at the top of a page

Pick something specific: "how vaccines train the immune system", "what a balance sheet shows", "how recursion works". A narrow concept is easier to explain well than a whole chapter.

2. Explain it in plain language, as if to a 12-year-old

Write or say an explanation using simple words and short sentences. Avoid jargon; if you must use a technical term, define it. Use an analogy or an example. This is the core of the method: simple language leaves nowhere to hide.

3. Identify the gaps and go back to the source

You will hit points where you hesitate, wave your hands, or fall back on a memorised phrase you cannot unpack. Mark them. Return to your textbook, notes or teacher to fill those specific gaps, then try the explanation again.

4. Simplify and organise

Read your explanation from the beginning. Shorten long sentences, replace jargon, and arrange the ideas in a logical order. If possible, explain it to a real person and watch where they look confused.

An example

Concept: compound interest.

First attempt: "It's exponential growth because interest compounds over periods."

That sentence uses the words without explaining them. The gap is clear: what does "compounds" actually mean?

Better attempt: "When you save money, the bank pays you a little extra, called interest. With compound interest, next year you earn interest on your original money and on last year's interest. So the amount you earn gets bigger every year, like a snowball rolling downhill and picking up more snow."

Now a beginner could follow it, and so could you in an exam.

Why it works

• It forces active recall. You are producing knowledge, not rereading it. See our guide to active recall.
• It exposes the illusion of understanding. Familiar terms can make us feel we understand when we do not.
• It encourages connections. Analogies link new ideas to things you already know, which makes them easier to remember.

Ways to use it

• Revision: pick the five topics you feel least sure about and explain each one on a single page.
• Study groups: take turns explaining topics; listeners ask "why?" until the explainer hits a gap.
• At work: before presenting a proposal, explain it in three sentences to a colleague outside your team.
• Writing: draft the "simple explanation" first, then add technical detail.

Limitations

Simplifying is not the same as being imprecise. In technical subjects, after you can explain the idea simply, check that your explanation is still correct and add the precise terms and conditions back in. The goal is understanding, not oversimplification.

The Feynman technique pairs well with structured notes; see our comparison of note-taking methods.