[btilly]

The last one that I wound up petering out on was an explanation of the Kelly Criterion on optimal gambling strategies.

I did quite a bit, see http://elem.com/~btilly/kelly_criterion/ and http://elem.com/~btilly/kelly_criterion/betting-returns.html for what I did. However I petered out once I had completely figured out the fun part, which is how to write the JavaScript to numerically solve the maximization problem of finding the optimal solution in any number of dimensions. (Of course I did so before I finished typing it up, which is why the calculator doesn't have an optimization option on it.)