[the_new_guy]

So, mathematics, for instance.....you'd start with differential equations and work your way down to......addition/subtraction?

[Solvency]

That's a low effort interpretation.

Every kid in the world understands the concept of 3D games, Minecraft, etc. That's a perfect vehicle to begin breaking it down into relevant simple math concepts.

[alistairSH]

Or just a basic web site that has some JavaScript. Or a form/submit.