John Tierney says that Advanced Placement classes and tests are a scam. These paragraphs stand out to me because they reflect my experience:
AP courses are not, in fact, remotely equivalent to the college-level courses they are said to approximate. Before teaching in a high school, I taught for almost 25 years at the college level, and almost every one of those years my responsibilities included some equivalent of an introductory American government course. The high-school AP course didn't begin to hold a candle to any of my college courses. My colleagues said the same was true in their subjects.
The traditional monetary argument for AP courses -- that they can enable an ambitious and hardworking student to avoid a semester or even a year of college tuition through the early accumulation of credits -- often no longer holds. Increasingly, students don't receive college credit for high scores on AP courses; they simply are allowed to opt out of the introductory sequence in a major. And more and more students say that's a bad idea, and that they're better off taking their department's courses.
I took eight AP courses in high school (if I'm remembering right) and passed all my AP tests. In 1995 I did receive credit for those courses at UCLA as well as being allowed to skip many introductory classes. Because of my AP chemistry test score I didn't have to take any chemistry classes at UCLA, even though I was an engineering student. (I was excited at the time, but now I regret missing exposure to college chemistry.)
At least two of these AP classes were harmful to me: Calculus AB and Calculus BC. Because I aced these AP tests I received credit for two introductory quarters of calculus and was skipped straight to the third calc class of the series. I struggled to make sense of the course content and was relieved to pass the class with a C-. The two AP calculus classes I had passed had left me completely unprepared for the material. I also received a C grade on my next math class before I figured out that I wasn't stupid, I was just way behind the other students. It took a lot of studying and make-up work for me to bring my grades and my comprehension up to an acceptable level.
Those were the only C grades I ever received in college, and I blame them on the Advanced Placement classes.