Guide · Study science
Named after the physicist Richard Feynman, the idea is brutal and effective: if you can’t explain it in plain language, you don’t really understand it. Here are the four steps — and how to pair them with active recall.
Write the concept at the top of a blank page.
Teach it as if to a curious 12-year-old — plain words, no jargon, concrete examples.
Wherever you stall or reach for jargon, that’s a gap. Go back to the source and fill it.
Rewrite until the explanation is clean and an analogy makes it click.
Explaining forces you to organise ideas and exposes the difference between recognising a term and understanding it. It’s active recall aimed at comprehension rather than facts — which is why it pairs so well with flashcards for the facts.
Use Feynman to understand the concept, then turn the key facts into flashcards (the AI can draft them from your notes) so spaced repetition keeps them. Understanding plus retention is the whole game. The AI tutor can even play the “curious student” and probe your explanation for gaps.
It’s teaching used as a diagnostic — the goal isn’t the lesson, it’s finding the exact points where your understanding breaks down so you can fix them.
Flashcards drill discrete facts; Feynman builds conceptual understanding. Use Feynman to truly get it, then flashcards to remember it.
Yes — explain a concept to Brainfy’s AI tutor and ask it to poke holes; it surfaces the gaps a 12-year-old would.
Yes — the AI tutor and flashcards are free during beta.
Brainfy is built by Aihan Mifthas · Last updated 2026-05-31. Open Brainfy →