The thing is, if you believe in the unconscious - and I do - there's room for all kinds of possibilities that I don't know how you prove one way or another.
A lot of the ideas or even individual technologies behind Khan Academy are not novel.
I remember when my mother, Shyamala Harris, bought our first home. I was thirteen. She was so proud, and my sister and I were so excited. Millions of Americans know that feeling of walking through the front door of their own home for the first time - the feeling of reaching for opportunity and findi

