Despite the fact that I grew up to earn a degree in mathematics, I remember math classes in my elementary school as pretty much the dullest subject on earth. Which is probably one of the reasons I love Vi's doodles so much. Experiencing mathematics through doodling while bored seems way more fun than paying attention did. Here's a video of binary tree and fractal doodles to spice up your beginning of term review boredom:
Still bored? Check out the other neat stuff at vihart.com.