'Twas brillig, and the slithy toves did gyre and gimble in the wabe

I agree. If math were taught like this, it'd've been so much more fun than trying to figure out which'll happen first: the tank with a hole draining or filling with water (oh, first-semester calculus. How I don't miss you).

And thank you! ^_^ It took me a good long while to settle on a Ravenclaw icon, but when I saw this one, I know it was The One. :D