Richard Feynman was a Nobel Prize-winning physicist and one of the most effective teachers in the history of science. His approach to learning was radically simple: if you can't explain something in plain language to a child, you don't actually understand it.
The Feynman Technique is a four-step learning system that exploits this principle to expose gaps in understanding and close them with precision.
The Four Steps
Step 1 — Choose a Concept: Write the name of the concept at the top of a blank page. Start with a single, specific idea, not a broad field.
Step 2 — Explain It in Plain Language: Write out your explanation as if you're teaching it to a 12-year-old. No jargon. No shortcuts. Full sentences. This is where gaps become visible — you will hit points where you realize you're using words you don't actually understand.
Step 3 — Identify the Gaps: Every place you got stuck, used undefined jargon, or wrote something vague is a gap. Return to your source material specifically to fill those gaps.
Step 4 — Simplify and Use Analogies: Return to your plain-language explanation with the gaps filled. Now simplify further. Find analogies that connect the concept to something the learner already knows. The simpler the better.
Why It Works
Most studying is passive — re-reading, highlighting, watching videos. These create an illusion of understanding without building actual recall or transfer ability.
The Feynman Technique forces active retrieval: you must generate the explanation from memory, not recognize it. Retrieval practice has been proven in hundreds of studies to dramatically outperform re-reading for retention.
The "Curse of Knowledge" Trap
Experts often can't teach because they've forgotten what it's like to not know. Feynman explicitly protected against this by always returning to first principles. He refused to accept that anything was "obvious."
Takeaway
Understanding is the ability to generate explanation, not recognize it. If you can't explain it simply, you don't know it yet. Learn more frameworks like this on the free CogniScroll Feed.