Watching videos online usually means goofing off. But over the past few years, millions of decidedly enterprising people have turned on their computers to watch, of all things, math and science ...

Proponents see the tools as a way to automatically customize academic support. They could also make children test subjects for A.I. experiments. By Natasha Singer Natasha Singer, who covers education ...

When Sal Khan first launched Khan Academy in 2008, it was little more than a collection of YouTube math tutorials recorded for his cousins. Today, it’s a global nonprofit serving over 150 million ...