Most high-school math classes are still preparing students for the Sputnik era. Steve Levitt wants to get rid of the “geometry sandwich” and instead have kids learn what they really need in the modern era: data fluency.

In the U.S. alone, we hold 55 million meetings a day. Most of them are woefully unproductive, and tyrannize our offices. The revolution begins now — with better agendas, smaller invite lists, and an embrace of healthy conflict.