Here’s a sampling of some of our favorites. Also, you can buy Math for Love T-shirts Here!

**Our New York Times Numberplay Guest ****Posts**

Let’s Play 1-2 Nim

Don’t Make a Triangle 1

Don’t Make a Triangle 2

Avoiding Attack

What Color Is the Bear?

The Angle Maze

Pilgrim’s Puzzle

Squareable Numbers

**Videos**

One Minute Math Video: Summing 1000 numbers vs. a bag of chips

Pythagorean Theorem 1

Pythagorean Theorem 2

Serpinski Talk

A Brief Interview of Dan on Intrinsic Motivation

Billiard Balls and Laser Beam Talk

**Some Favorite Problems and Lessons**

Bishop on a Torus Chess Board

Is It Fair? Fractions and Pattern Blocks

Symmetry and Pattern Blocks 1

Symmetry and Pattern Blocks 2

Midpoints of a Quadrilateral Form a Parallelogram

Magic Squares Lesson

Damult Dice: A Better Way to Practice Multiplication

The Dr Square Puzzle

Part 1

Part 2

Part 3

Diffy Squares

Part 1

Part 2

Part 3

Chessboard Problems

Part 1

Part 2

**Philosophy, Education, Commentary, and Inspiration**

5 Principles of Extraordinary Math Teaching

Girls and Math

Breaking Math

Asking Questions

The Short List: books, games and resources for families

Bottlenecking

Born to Run

The Best Classrooms Don’t Use Tech

Student Questions

Is my child learning enough?

Learning from Mr. Miyagi: At Some Point, It Needs to be Useful Right Now

What is your Mathematical Living Room Like?

Proof to Puzzle to Proof: A Geometric Puzzle from a Student

On Danger, and Big Numbers

The Courage to Dream (of School Reform)