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Sarah never smiled in my classroom. At least not with her eyes. She spoke under her breath. Whispers of words I couldn’t usually hear. She is one of the many students who I remember because despite my ...

When your project for the day is painting a room, you probably don’t reach for a calculator. And if any math does come up, it’s likely the stuff you’ve known since grade school: Estimate the area of ...

Michael Freedman’s momentous 1981 proof of the four-dimensional Poincaré conjecture was on the verge of being lost. The editors of a new book are trying to save it. One of the most important pieces of ...