Richard Feynman, the Nobel Prize-winning physicist, was famous for his ability to explain complex ideas in simple terms. His learning technique is devastatingly effective for math.

The Four Steps

Step 1: Choose a Concept

Pick one specific math idea. Not "algebra" - that's too broad. Instead, pick "solving quadratic equations by completing the square."

Step 2: Teach It to a Child

Write an explanation as if you're teaching a 12-year-old. No jargon. No shortcuts. If you can't explain it simply, you don't understand it well enough.

Step 3: Identify Gaps

When you get stuck explaining something, that's where your understanding breaks down. Go back to the source material and fill the gap.

Step 4: Simplify and Use Analogies

Refine your explanation. Use analogies. Make it memorable.

Applying It to Mental Math

Here's the Feynman Technique applied to percentage calculations:

Concept: Finding 15% of any number.

Simple explanation: 15% = 10% + 5%. Find 10% by moving the decimal point left. Then take half of that for 5%. Add them together.

Example: 15% of 240

• 10% of 240 = 24
• 5% of 240 = 12 (half of 24)
• 15% = 24 + 12 = 36

See? No formula memorization. Just understanding what percentages actually mean.

Why This Works

The Feynman Technique forces active recall instead of passive reading. When you explain a concept, your brain builds stronger neural pathways than when you simply re-read a textbook.

Studies show that students who teach material to others retain 90% of what they learn, compared to just 10% from reading alone.

Start Today

Pick one math concept you find difficult. Open a blank document and explain it as simply as possible. You'll be surprised how quickly your understanding deepens.