Four things we don't know about AP tests

Yes, I know, I keep posting about this. But:

"remarkably little independent research has been conducted on the academic benefits of AP." That's according to Russell T. Warne, an assistant professor of psychology at Utah Valley University, who has done some of that limited research. Part of the problem, he tells NPR Ed, is that, "it's really hard to do causal research because we can't force people to do AP or force them out of it."

If we're going to keep pushing kids to take these course, we ought to be looking into this stuff first.