Study methods

Feynman method: explain it simply to understand it

By Fichea · Updated November 12, 2026

You reread a chapter, everything seems clear, then you get stuck as soon as you have to explain it to someone. The Feynman method starts from that gap: explaining a notion quickly shows what rereading let slip. Here’s how to apply it to a notion from your course, with a full example and its limits.

What is the Feynman method?

The Feynman method is used to check your understanding: you explain a notion to an imaginary audience that knows nothing about the subject, often a ten- or twelve-year-old. This audience bans jargon. Every time you need a technical word, you have to say what it means. The places where you can’t manage are your gaps in understanding.

It’s named after Richard Feynman, an American physicist and Nobel Prize winner in physics in 1965, known for his very clear explanations. The four-step version found today in study guides and on social media was formalized after him, and nothing shows that he described it in this form. Use the method for what it does, without attributing a quote to him.

Why does explaining help you spot what you don’t know?

Researchers at the University of Waterloo sum up a well-studied phenomenon: we often overestimate our understanding of how things work, and trying to produce an explanation exposes the gaps. It’s called the illusion of explanatory depth. When studying, it explains why a chapter reread several times can seem mastered even though you can’t explain it.

A 2014 study (Nestojko et al.) points the same way. Students who were told they would have to teach a text recalled more of it, and in a better organized way, than those who expected a simple test. In the end, nobody taught: it was the announcement that changed the way they studied.

How do you apply the Feynman method step by step?

Take a single notion, not a whole chapter: “inflation”, “photosynthesis”, “the Pythagorean theorem”, “the separation of powers”. Close your course before you begin. If it stays open, you’re rewording the page in front of you and no longer searching your memory.

A typical session takes about half an hour, with durations to adjust: five minutes to explain without notes, ten minutes to compare with the course, ten minutes to rewrite, then five minutes to prepare two or three questions you’ll ask yourself in a few days.

Step 1: write the name of the notion at the top of a blank sheet.
Step 2: explain it without your notes, as if to a middle schooler, out loud, in writing or while recording yourself.
Step 3: underline every place where you hesitate, skip a step or copy a word from the course without explaining it.
Step 4: reopen the course only on those passages and note what you were missing.
Step 5: rewrite a shorter explanation, with a concrete example, then reread it out loud.

Full example: explaining inflation to a middle schooler

Take a chapter from a first-year economics and social sciences or economics course. With your notes closed, your first explanation goes like this: “Inflation is when everything gets more expensive and money loses value.” It sounds right, but it doesn’t hold up against a curious student’s questions.

Ask yourself these questions in their place. Does everything really go up, even what goes down? For how long? Who measures it, and how? What does “losing value” mean for a banknote that still says €20? Each question without a clear answer marks a passage of the course to reread.

Spot the gaps, then fix the explanation

First version: “Inflation is when everything gets more expensive and money loses value.” What gaps does it contain, and what does a simple but accurate explanation look like?

Read the explanation

“Everything” is wrong, because some prices fall; the duration is missing; the measurement isn’t explained. Corrected version: inflation is a general and lasting rise in the price level. We track the price of a basket of goods and services bought by households; in France, Insee calculates the consumer price index for this. If the basket goes from €100 to €103 in a year, inflation is 3%. With the same banknote, you buy a little less: that’s the drop in the currency’s purchasing power. If your salary also goes up 3%, your purchasing power stays about the same.

Common mistakes and limits of the Feynman method

The most common mistake is explaining with the course vocabulary. A sentence like “inflation can come from an excess of aggregate demand” sounds good; if you can’t say what aggregate demand is, you recited. Another trap: rereading the page just before explaining. You then reword a text that’s still fresh, and the gaps stay hidden.

Also beware of comparisons that are too neat. An analogy helps you get started, but it can distort the notion: check that it respects the course definition. Keep one notion per session, because explaining a whole chapter this way takes hours.

The Feynman method is for understanding. It isn’t enough for rote learning: a list of dates, language vocabulary, an exact formula or an article of law are better remembered with questions and answers reviewed at intervals. In math or physics, knowing how to explain a method doesn’t replace the exercises where you have to choose it and apply it on your own.

Using the Feynman method with Fichea

Once your explanation is written, compare it with your course. In Fichea, you can ask a question about the passage that stopped you, for example “Why do we talk about a lasting rise in prices?”. Luna, the assistant, answers relying on quoted passages from your document, with the page and the excerpt: reread them to check the answer before you take it on board.

To find out whether your new explanation holds, then start a multiple-choice quiz on the same chapter; each question is followed by an explanation. The features and volumes available depend on your plan.

Frequently asked questions

Was the Feynman method invented by Richard Feynman?

It bears his name because the physicist Richard Feynman was known for explaining complex ideas in simple words. The four-step version circulating in study guides was formalized later by other authors. Nothing proves he described it this way: beware of quotes attributed to him without a source.

Should you explain out loud or in writing?

Both work. Out loud, you go faster and you hear your hesitations. In writing, you keep a record you can compare line by line with your course. A simple solution is to record yourself on your phone while you explain, then note on a sheet the passages where you got stuck.

Who do you explain to when you study alone?

You don’t need anyone. Imagine a younger student, a classmate who missed the lecture or even an object on your desk. The only rule is to ban jargon: every technical word has to be explained. If someone close to you agrees to listen, ask them to stop you as soon as they don’t understand, because that’s where your gaps hide.

Does the Feynman method work in math?

Yes, for understanding a notion or a method: why we factor, what a derivative represents, when to use a theorem. Explain the steps of a solved exercise as if you were teaching it to someone. It doesn’t replace practice, though: then solve new exercises on your own, without looking at the correction.

What’s the difference between the Feynman method and blurting?

Blurting means writing in one go everything you remember about a chapter, then checking what’s missing. The Feynman method targets a single notion and tries to explain it simply, to test your understanding. The two combine well: blurting spots the forgotten areas, the Feynman method digs into the ones you only half understand.

Go further

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