Feynman it.

Study guide

How to use the Feynman Technique to understand what you study

The Feynman Technique is a way of studying where you explain a concept in plain words until the explanation holds up. It is named after the physicist Richard Feynman, who was known for explaining hard ideas simply. This guide covers the steps, a template you can reuse, a worked example, and where the method stops being the right tool.

What the Feynman Technique is

Rereading produces recognition, not understanding. A page feels familiar the second time, and familiarity is easy to mistake for knowledge. The Feynman Technique breaks that illusion by making you produce the idea instead of reviewing it. When you explain something aloud in ordinary words, the parts you do not understand become audible: you slow down, you reach for the textbook phrase, or you skip a step.

The method is a loop, not a checklist. You explain, you notice a gap, you go back to the source for that one gap, and you explain again.

The four practical steps

  1. 1. Write the concept at the top of a blank page

    One concept per page. “Equilibrium price”, not “microeconomics”. A narrow scope is what makes the gaps visible.

  2. 2. Explain it in plain words, from memory

    Write or speak as if the listener is a curious twelve-year-old. No notes, no textbook phrasing. Use everyday analogies where they are honest.

  3. 3. Find the gaps and return to the source

    Mark every place you hesitated, waved your hands, or used a term you could not define. Look up only those places.

  4. 4. Simplify and explain again

    Cut jargon, shorten sentences, and say it again from the start. Repeat until the explanation runs without stopping.

A reusable explain-it-back template

Copy this into your notes

  • It is about: [the concept in one sentence]
  • It is a bit like: [one everyday comparison]
  • It works like this: [three steps, in order]
  • It matters because: [what changes if it is true]
  • It breaks down when: [one limitation or exception]
  • The question I would fear: [your own follow-up]

A worked example: supply and demand

First attempt. “Equilibrium is where the supply curve and the demand curve intersect.” That is a definition, not an explanation. It repeats the textbook and answers nothing.

Plain-words attempt. “If the price is too high, sellers put more on the shelves than buyers want to take. Stock builds up, so sellers cut the price. If the price is too low, buyers want more than sellers are offering, so shops run out and the price rises. The price settles where the amount offered and the amount wanted are the same.”

The follow-up that finds the gap. “What happens if supply rises while demand stays constant?” If your answer is “the price goes down”, you have the direction but not the mechanism. The fuller answer: at the old price there is now more on offer than buyers want, that surplus pushes the price down, and the lower price both discourages some sellers and attracts some buyers until the amounts match again — at a lower price and a higher quantity.

The gap was not the definition. It was the chain of events between the change and the new price. That is exactly what an examiner probes.

How to use the technique for exams

  • Turn your syllabus into a list of concepts, then explain one per short session rather than rereading whole chapters.
  • For an oral exam or viva, speak the explanation out loud and time it. Two minutes per concept is a realistic target.
  • Write the three follow-up questions you would least like to be asked, then answer them in writing. Fear is a good index of your weakest spots.
  • Keep a gap list. In the last week before the exam, revise the gap list, not the book.
  • For written exams, the explanation becomes your essay skeleton: claim, mechanism, example, limitation.

Common mistakes, and when to use another method too

  • Explaining with the book open. The point is retrieval. Close it.
  • Simplifying into something false. An analogy that gets the answer wrong is worse than a technical sentence. Say where the analogy stops.
  • Stopping at the definition. A definition rarely survives one “why?”.
  • Choosing a topic that is too broad. One concept, one page.
  • Using it for pure recall. For terminology, dates, formulas and vocabulary, use spaced repetition alongside it. For procedural skills such as solving problem sets, practise the problems themselves.

FAQ

Can I use it alone?
Yes. Explain out loud to an empty room, to a voice recorder, or in writing. The value comes from producing the explanation, not from having an audience. A listener helps mainly by asking the follow-up question you avoided.
Does it work for memorisation?
Partly. It is strongest for concepts, mechanisms and arguments. For vocabulary, dates and formulas, pair it with spaced repetition: understand the idea by explaining it, then rehearse the exact items separately.
How long does it take?
One concept takes about fifteen minutes: five to explain, five to check the gaps, five to explain again. Short, repeated rounds beat one long session.

Try one round now

Pick one concept you will be asked about, explain it in your own words, and answer the follow-ups. No account needed.

Start a practice round