The Feynman Technique: A 4-Step Method for Learning Anything

TL;DR. The Feynman technique is a 4-step method for learning any concept deeply: 1) pick a concept, 2) explain it in plain language as if to a child, 3) find the gaps where your explanation breaks, 4) refine and simplify. Named after Richard Feynman, who used the approach to teach himself complex physics and to teach others.

The 4 steps

Step 1 — Pick a concept

Write the concept at the top of a blank page. Keep it specific: not “quantum mechanics,” but “why electrons orbit in shells rather than at any distance from the nucleus.”

Step 2 — Explain in plain language

Write or speak an explanation as if you were teaching a curious 12-year-old.

Rules:

This step exposes the gaps in your understanding.

Step 3 — Find the gaps

Reread or replay your explanation. Identify:

For each gap, go back to the source — textbook, paper, original — and re-learn just that part.

Step 4 — Refine and simplify

Rewrite the explanation, fixing the gaps. Use simpler language than the first draft. Test it on a real person if you can.

Iterate steps 3–4 until you can explain the concept smoothly.

Why it works

The technique combines three high-leverage learning principles:

Example: JavaScript closures

First attempt: “A closure is when a function has access to variables from its enclosing scope, even after that scope is gone.”

Gap: What does “enclosing scope is gone” mean?

Refined: “When you write a function inside another function, the inner function can ‘remember’ the variables that were in the outer function — even after the outer function has finished running. It's like leaving a sticky note for yourself: the office (outer function) closes for the night, but your sticky note (inner function) still remembers where you put the keys.”

Common mistakes

When Feynman doesn't apply

Feynman + quizzing

After explaining the concept smoothly, write 5 quiz questions about it. Use the AI quiz generator to generate questions and compare to your own — any question you didn't think of points to a remaining gap.

Related reading

Test your explanation with an AI quiz →