Turns out high school isn't really all that tough to figure out after all -- so long as you can pass pre-calc.

ENGADGET: Alt-week 7.28.12: social mathematics, Pluto's moons and humans-on-a-chip

Android smartphone users can try Kids Shopping Calc, which teaches budgeting by shopping in a virtual store with a set amount of money.

WSJ: Making Young Kids Smarter About Finance