Believe it or not, highway numbers actually make sense. Here's the logic behind odd and even routes, and why the system isn't ...

1. Fast and Slow Piles. This works well as a starting or closing activity. Students sort math fact cards into fast and slow piles. This visual way of tracking facts highlights which facts come ...

For centuries, humans have assumed that our thinking errors set us apart from the rest of the animal kingdom. From misjudging ...

Two decades ago, the mathematician Moon Duchin spent her summers teaching geometry at Mathcamp, a program for mathematically talented teens. Campers contemplated notions such as how to prove whether a ...