It should be noted that Kaplan, Inc. is owned by the Washington Post Co. and is, I believe, the WaPo Co.'s largest source of revenue: http://en.wikipedia.org/wiki/Kaplan,_Inc.

(I'm of the belief that it's possible for a large news company to give equal commentary share to competing interests, but I don't follow the WaPo's education coverage enough to be able to make a judgment in this case)