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 ...

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 ...

An apparently easy-looking math problem has left internet users scratching their heads. Give it a try to see if you can ...

Alcatraz Federal Penitentiary closed in 1963 and operates as a museum. President Donald Trump on Sunday that he doesn't know if he is supposed to uphold the Constitution and relies on his lawyers to ...