Research shows watching at double speed speeds up the process without impacting learning or retention.

A few years ago, a computer scientist named Yejin Choi gave a presentation at an artificial-intelligence conference in New Orleans. On a screen, she projected a frame from a newscast where two anchors ...

This story is part of a series on how we learn—from augmented reality to music-training devices. For the students in Emanuelle Burton’s ethics class, the story is tricky to grok. “They’re like, you ...