Dan Murphy

Teacher & writer on liberal arts, history of schooling, and teaching mathematics rightly. Recovering forgotten truths.

[Dan Murphy @danbmurphy]

One-room schoolhouses didn't fail kids.
They outperformed modern consolidated schools.
In 1924, reformers tried to prove rural one-room schools were inferior. Instead they proved the opposite
The data was buried, efficiency won.
We traded what worked for what we could control.

[Dan Murphy @danbmurphy]

@Beno10_MFC I meant 120

[Dan Murphy @danbmurphy]

@Beno10_MFC Haha! 140
Terrible drawing...

[Dan Murphy @danbmurphy]

@Principal_Jon We banned that book from my school...😂

[Dan Murphy @danbmurphy]

@Georgia_07os 13

[Dan Murphy @danbmurphy]

@kafisayz 15

[Dan Murphy @danbmurphy]

Part 7/7
Solve for dy/dx:
dy/dx = 2x
Voila!

[Dan Murphy @danbmurphy]

Part 1/7
Calculus Made Easy:
Why is dy/dx = 2x when y = x²?

[Dan Murphy @danbmurphy]

Part 6/7
If dx is small, then (dx)² is tiny, basically zero.
Get rid of it:
dy = 2xdx

[Dan Murphy @danbmurphy]

@Daphne_lkm 3/6+2/6+1/6 = 6/6 = 1

[Dan Murphy @danbmurphy]

@preshtalwalkar 64

[Dan Murphy @danbmurphy]

@MustafaCharts 7

[Dan Murphy @danbmurphy]

@Math_files Those were the days...
From page 12, on the derivative.

[Dan Murphy @danbmurphy]

@rpondiscio @AEIdeas The first progressive education reformer, Horace Mann, homeschooled his own children.
That should tell us something...

[Dan Murphy @danbmurphy]

After a year of carving, my chess set is finished. 32 pieces. Hundreds of hours. There's something about working slowly with your hands that changes how you think. It's pure contemplation.

[Dan Murphy @danbmurphy]

942 subscribers reading about What Schools Forget on Substack.

I might hit 1,000 this week.

Didn't see that coming.

[Dan Murphy @danbmurphy]

As we approach the 250th anniversary of the signing of the Declaration of Independence, we ought to remember how the signers were educated: liberal arts.

A liberal arts education is education for a free people.

This kind of education is sorely needed today.