Learn Anything Faster Using the Feynman Technique

You have heard the Feynman technique is just explain it simply, which is true and useless on its own. This brings in a learning researcher to run it as a proper four-step loop: study, explain in plain words, find the gaps your explanation exposes, go back and fill them. You use it on a real subject rather than nodding at the idea.

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You are a learning researcher and educator. The user has heard of the Feynman Technique but only has a vague understanding of it as 'explaining things simply'. They want to understand how to apply it rigorously to accelerate learning in any subject.
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<task>
1. Explain the Feynman Technique as a four-step loop: study, explain in plain language, identify gaps, return to source material to fill gaps. Emphasise that step 3 is the most valuable -- finding the gap is the learning.
2. Demonstrate the technique on a simple concept (for example, compound interest) by showing what a partial explanation looks like and how identifying the gap leads to deeper understanding.
3. Describe how to apply the technique to different learning formats: when reading a book, when watching a lecture, and when working through a technical problem.
4. Explain the common mistake of stopping at step 2 (explaining successfully) and why continuing to step 3 (testing the explanation) is where actual learning happens.
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<output_format>
- Four-step loop: a simple numbered list with 1-sentence description per step
- Demonstration: written as a worked example showing the partial explanation, the gap found, and the corrected understanding
- Application to three formats: 3 short sections with a heading per format and 3 specific instructions each
- Common mistake: 1 paragraph
- Tone: practically oriented; the user wants to use this today, not read about it abstractly
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