Teacher questions value of AP program

A popular article describes the problem with the AP program:
A warning to college profs from a high school teacher.

Performance on the AP test, while indicating some level of competence, does not necessarily mean one has learned what one would in the equivalent college course…Dartmouth College will no longer give credit for AP because when they tested incoming students who had scored well on the AP Psychology test the vast majority failed what would have been the end-of- course exam in Dartmouth’s introductory psychology class.

After a rebuttal, the author defends his position:
Teacher questions value of AP program