While many use YouTube solely to watch videos of cats, increasing numbers use it for education and training. Phil, CC BY-SA For many, YouTube is little more than a deluge of low-quality videos ...

A student opens their Chromebook and logs into AP Classroom. Opening their assignments, they begin an AP Daily video lesson, taking notes as they watch. The student adjusts the playback speed to 1.5, ...

The most popular educator on YouTube does not have a Ph.D. He has never taught at a college or university. And he delivers all of his lectures from a bedroom closet. This upstart is Salman Khan, a ...

YouTube, with its view-count ticker, has become a useful tool for determining the popularity of an online video — whether it has gone “viral,” as the kids say. Atop YouTube’s list of most-popular ...