I had a high school teacher that, while not as good as Walter Lewin, was close. And for high school, I consider that a blessing. He got National teacher of the year at one point. None of my profs in college were even close to that good, and we're talking UC Berkeley. I've recently learned that there is a very large gap between a very good school, and a great school. And an even larger gap between the great professors and good professors. THere's something extremely inspirational about teachers like Lewin and Khan. You listen to them talk about things that you ALREADY know, but somehow it inspires you and creates ideas for you. These people are my most treasured resources in life. GUys like that, even the knowledgeable people here, Stephen Fry...they create ideas for you, which is a powerful thing.