Doodling in math class?

This is mostly useful for classroom teachers, but I thought it's a really NEAT idea -- and could be adapted to other situations. The students "doodle" and color in the notes however they like, which makes them REMEMBER better!

Math Doodle Notes

You'll find some freebies and some commercial products here, and of course the idea of doodle notes itself. You can make these yourself also!