Sal Khan is an uber-nerd, and that’s why people love him. In early 2020, to demonstrate that Khan Academy, his platform for free online education, was a worthy cause, he didn’t produce a brochure with ...

New A.I. tools could enable a Silicon Valley dream: bots that customize learning for pupils. Prior attempts have not lived up to the hype. By Natasha Singer Natasha Singer, a technology reporter, has ...