<p>Colleges even give different levels of credit depending on what school you have enrolled in at the college - math requirements may be higher for engineers or business students to be given credit and science majors may not be able to earn any credit for sciences - all depends on the school.
It's also difficult for students to know which APs will give them credit if they don't know which school they will attend until May. My d is going to a school which only accepts a 5 and on a limited number of AP subjects. She will end up taking 9 AP tests over 3 years and maybe get credit for 3 or 4 of them even though she has scored all 4s and 5s. Does she regret taking them? No - she's been in classes with more dedicated students and better teachers.</p>