Discussion about this post

User's avatar
David B Hayes's avatar

Many students at Magdalen College struggled with math and science.

In math I found it very helpful to teach Book I Proposition 2 to mastery by ensuring that every student could direct the proposition blindfolded. This built up their imagination and also taught them how abstract thinking is not "picture thinking."

In science, George Stanciu focused on Newton's three laws of motion to mastery. Most physics texts in high school and college briefly state the three laws and then go on to numerous other topics. Most physics students misunderstand the laws, especially the third law that for every action there is an equal and opposite reaction. By the common misunderstanding of the third law of motion, nothing would ever move. After a year teaching physics in Brazil, Richard Feynman proclaimed at a large gathering that "No physics is being taught in Brazil." He demonstrated that the most favored physics text book had fake experiments and everywhere in the book there was word games and not real science. In one example of rolling a ball down an inclined plane, an incomplete formula was used that ignored rotational inertia making the calculated velocity of the ball 33% faster than the velocity of a real ball rolled down the inclined plane. During his speech he randomly put his finger in the book and showed how the book talked about triboluminescence but gave the reader no understanding nor example of it.

“I have discovered something else,” I continued. “By flipping the pages at random, and putting my finger in and reading the sentences on that page, I can show you what’s the matter – how it’s not science, but memorizing, in every circumstance. Therefore I am brave enough to flip through the pages now, in front of this audience, to put my finger in, to read, and to show you.

So I did it. Brrrrrrrup – I stuck my finger in, and I started to read. Triboluminescence. Triboluminescence is the light emitted when crystals are crushed…

I said, “And there, have you got science? No – you have only told what a word means in terms of other words. You haven’t told anything about nature – which crystals produce light when you crush them, why they produce light. Did you see any student go home and try it? He can’t.”

“But if, instead, you were to write, ‘When you take a lump of sugar and crush it with a pair of pliers in the dark, you can see a bluish flash. Some other crystals do that, too. Nobody knows why. The phenomenon is called ‘triboluminescence.’ Then someone will go home and try it; then there’s an experience of nature.” I used that example to show them, but it didn’t make any difference where I would have put my finger in the book – it was like that everywhere.

(Richard P. Feynman and Ralph Leighton, Classic Feynman : all the adventures of a curious character, 1st ed. (New York: W.W. Norton, 2006). pp. 223-224. (emphasis added))

Expand full comment
NotaBot's avatar

Also applies to physical training -I would rather my clients do one slow controlled proper form of an exercise than rush through 10x sloppy versions.

Expand full comment
11 more comments...

No posts