Bored? Try Doodling To Keep The Brain On Task

I like graph paper for making vaguely mathematical doodles in classes. I even happened to independently "invent" a few concepts while doing this, like triangular numbers and the polyomino sequence. :-)

Glad to know the over 5000 fictional insect species I've drawn over the years were not completely useless. However, I find talking to myself / a figment of my imagination is even more effective at keeping me concentrated. Unfortunately, there are not many places where that is appropriate.