YouTube opens a channel for teachers. One small problem. YouTube says it's a great way to reach those "visual learners," which is a reference to the debunked notion of "learning styles." Here's cognitive pyschologist and neuroscientist Dan Willingham talking about learning styles on, of course, YouTube:
Read an article about the YouTube Teacher channel at Mind/shift, which includes this rap video on YouTube about the Krebs Cycle. You don't have to be an "auditory learner" to appreciate the creative approach to biochemistry.