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 ...

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 ...

"Never Enough" author Jennifer Breheny Wallace shares the parenting rule she uses with her three teens. Not only does it help them thrive, but it also reduces tension at home.

A woman who has been in a polyamorous relationship with her husband for more than a decade has spilled the beans on what 'strict rules' they have to follow. Danielle was born and raised in a ...