Doodling in math: Spirals, Fibonacci, and being a plant [1 of 3] (video) | Khan Academy

Voiceover:Say [unintelligible], you're in math class and your teacher's talking about ... Well, who knows what your teacher's talking about. Probably a good time to start doodling. And you're feeling spirally today, so yeah. Oh, and because of overcrowding in your school, your math class is taking place in greenhouse number three.