Math at Disney Studios
Is College Worth It? by John Green
\(13 \times 7 = 28\)
I don't necessarily check these
regularly so if you find a
broken link,
please let me know.
The Interactive Mathematics Miscellany and Puzzles is more fun than people.
You can buy your own Klein Bottle here. Disclaimer: I am not endorsing this product, nor am I recommending that you buy one. I just think this site is a lot of fun.