I laughed when I saw these. Not in a bad way or anything... they're quite good, especially from memory. No, I mean that that's more or less what my schoolwork looks like when I am bored. Which is all of the time. Admittedly, I've done less random, dismembered practice body parts in the margins and more more-or-less-complete-but-not-always-that-great dragons on the back as of late, but still... ah... good times. I think school was invented for doodling in margins, not for schoolwork.
[offtopic]So that's what Icelandic looks like... and, oddly enough, that math looks more or less exactly like what I'm studying. Functions and stuff.[/offtopic]