Learning math by ignoring your teacher and doodling

Vi Hart's "Mathematical Doodling" is a series of hilarious and informative narrated videos explaining doodle-games that you can play to explain mathematical concepts in a way that's much more intuitive than the traditional math-class methodologies. Above is binary trees, but be sure and click through to "Snakes + Graphs" -- a wonderful, captivating potted graph theory explanation.

Mathematical Doodling

(Thanks, PeaceLove!)