The Best Way To Watch Lectures At 2x Speed

So, a student could just watch videos at 2x speed and halve their time spent on lectures….Or, according to the results of other studies reported in the paper, they could watch a video at 2x normal speed twice, and do better on a test than if they’d watched it once at normal speed.

The timing mattered, though: only those who’d watched the 2x video for a second time immediately before a test, rather than right after the first viewing, got this advantage.