<p>^ One study did find that, “after correcting for differences in students’ academic backgrounds or previous science coursework”, students who had taken AP courses did better in their college science courses than their peers lacking AP experience. <a href=“Book Trains Critical Eye on AP Program's Impact”>Book Trains Critical Eye on AP Program's Impact;
<p>I suspect at least part of the reason for improved college performance by students with AP courses is due to the AP experience, but part is due to the self-selection factor. However, I disagree with the “APs for everyone” crowd because that inevitably leads to watered down AP courses.</p>