The most interesting thing I discovered was that in his estimation, students can self teach, especially younger ones. I believe this can be true in many cases but obviously not all. Older students, LD students, and others could make it difficult. With that being said, inquisitive and self motivated students of any language or background can be successful in this endeavor. Many of them could take the next step and become "teachers" of their peers.
Secondly, and an easy segue, is his thought about teachers and technology. It is best summed up by his quote of someone else, “a teacher that can be replaced by a machine, should be .”
His “Hole in the Wall” project was extremely entertaining as well as insightful.