Something important happened in the field of education this month. For the first time ever, any student anywhere can take top-quality courses online in every major freshman college subject, taught by professors from the most prestigious universities, that lead to full academic credit at 2,900 traditional colleges, such as Purdue, Penn State, Colorado State and the University of Wisconsin-Madison, all absolutely free. There is no tuition cost. No text book cost. No administrative or connection fees. No taxpayer subsidy or federal Title IV funding required. And this is not a plan for the future, but a working reality available to...