Shifting caste alliances and Nitish Kumar’s fading hold test the NDA’s Bihar strategy as the Mahagathbandhan finds new ground ...

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 ...

As clean energy grows, so do the limits of how it’s measured. A new Nature Climate Change study warns that rooftop solar’s ...

Australians are having fewer children than ever. At 1.5 babies per woman, the fertility rate is at a record low. Many ...

When it comes to the biggest challenge yet to solve, however, it seems there’s not much debate: “The Riemann Hypothesis has a ...