http://www.youtube.com/watch?NR=1&v=93n0QUfmDWQ&feature=fvwp
It might be fake, but somehow I doubt it. Imagine a kid who could think and write out the calculations with this kind of precision.
When I was doing my math homework, I used a scratch pad, and then copied onto the homework page. I got bad grades anyway, but it was great practice for thought.
CG