Watching a Khan Academy video a second time ... is unlikely to help understanding a concept better? > Still others believe—incorrectly—that more time spent on

Watching a Khan Academy video a second time ... is unlikely to help understanding a concept better? > Still others believe—incorrectly—that more time spent on a task produces better results Even more foundational skills like reading, writing, speaking, and school math (addition, division, algebra) are unlikely to get better with practice?