The proof, known to be so hard that a mathematician once offered 10 martinis to whoever could figure it out, uses number ...

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 ...

There are few sports more exciting than playoff baseball, but behind every pitch there is also a fascinating story of physics ...

Stocks: Real-time U.S. stock quotes reflect trades reported through Nasdaq only; comprehensive quotes and volume reflect trading in all markets and are delayed at least 15 minutes. International stock ...