I’ve started working on a project to use my love/ability for video games and my hatred/love/fear/admiration for math and my guilt-based feeling that I should make the world a better place.
The fundamental thrust is this: Calculators don’t make learning math a waste of time: Tons of cool stuff is built on math. The parts of math that are fun and interesting are exactly the parts a calculator can’t help you with. Math is taught as “STFU and do long division mechanics” as opposed to Math as a means to an end. When you see math as the thing that enables you to make mp3s, or Shrek, or Halo, then math sounds pretty worthwhile.
So I’m writing a simple video game w/ pluggable math components (and corresponding teaching aids) to motivate children to learn math (obviously the motivation to learn math is a pre-req to actually learning the mechanics.).
A video game is basically all math. From simple to crazy-hard. Furthermore, it is stuffed to the gills with little modular math parts which can be removed, yielding a way less awesome game. Now we can add the missing parts, using math, and make awesomeness.
I’ve got the framework, procedural terrain (hello math!) going.

I could build a summer on the math required to get to this point