The Feynman technique is a learning method in which you explain a concept in simple, plain language, as if teaching it to someone with no background, and then use the places where your explanation breaks down to decide what to study next.
How it works
Explaining something forces you to organise it. You have to put ideas in order, connect causes to effects and choose words that make sense without jargon. When you cannot do that, you have found the edge of your understanding. Specialist vocabulary often hides gaps: it is easy to say “the enzyme is allosterically inhibited” without being able to say what actually happens. Plain language exposes that.
The technique combines several well-supported learning processes: active recall, because you produce the explanation from memory; self-explanation, because you put the material in your own words; and metacognition, because you monitor where your understanding is weak.
How to use the Feynman technique (steps)
- Choose a concept. Write its name at the top of a blank page.
- Explain it simply. Without notes, write or say an explanation that a younger student could follow. Use examples and analogies.
- Find the gaps. Note where you got stuck, used jargon you could not define, or skipped a step.
- Go back to the source. Restudy only those parts until you can explain them.
- Simplify again. Rewrite the explanation more clearly and concisely. Repeat until it flows.
- Test it. Answer practice questions on the topic to check your understanding holds up.
Asking yourself “why?” at each step, as in elaborative interrogation, makes the explanation deeper.
Evidence
There are no controlled studies of the Feynman technique under that name, but its components are well researched. Chi and colleagues (1989, 1994) found that students who generated explanations to themselves while studying, known as the self-explanation effect, understood worked examples and science texts better than those who did not. Nestojko and colleagues (2014) found that people who studied expecting to teach the material later recalled more and organised it better than those expecting a test. Fiorella and Mayer (2013, 2014) found that actually explaining material to others on video improved learning beyond preparing to teach. Dunlosky and colleagues (2013) rated self-explanation as moderate utility.
Using the Feynman technique with Duetoday
In Duetoday, open the notes from a lecture, PDF or video and try explaining a concept to Galileo, the AI tutor. Galileo answers from your own material, so it can point out what you missed and ask follow-up questions. Turn the gaps you find into flashcards so they enter your spaced repetition reviews.
