Robert Talbert writes that, even if he remains convinced that “online video is an idea whose time has really come in education”, and thinks that the current videos of Khan Academy are a great resource for the niche in which they were designed to work, they have some inherent limits that should not be forgotten, namely:

  • the Khan Academy videos are (normally good) demos on how to finish mathematics exercises, with little modeling of the higher-level thinking skills
  • this kinds of learning objectives (learning mechanical skills) that Khan Academy videos focus on are important