google fellow and founder of udacity, high level course online.of with this is the internet teaching or had is this and that. tell us how it is that what you learned about -- what have we learned about the brain and how is -- our understanding of the brain and at the center of all of this new teaching? >> i think you are totally right. brain learns from being -- trying things out by i have a 4-year-old son experimenting all day. somehow the way they teach in colleges, teach lectures, talking down on people. what we are trying to do is have this website, online college. they can take college level classes and be confronted with fascinating puzzles you have to solve. and we won't show thank you answer. we show thank you answer after you tried it so you are perceptive what we think the right answer was. >> frank, when did we figure this out? obviously a way we all went to school was in a different paradigm which was largely rote memorization, age desegregation. when did the sort of brain research we are seeing apply to -- even come to be known? >> ce