Seems UChicago significantly changed the AP score requirement for giving either general education or elective credit. Until last year, a score of 3, 4, or 5 was enough to get credits for many AP classes. But for newer students, now for almost all AP classes a score of 5 is needed to get credit.
And also for some cases like AP calculus BC, a score of 5 gives only 1 course credit instead of 2 in past.
Good. I’m glad people who got a 5 in BC don’t get out of the math core. What’s the point of the core if you could just place out of it? You can’t place out of any other part of the core. In practice almost everyone took math anyways, because the people who got 5s on BC in high school also tended to be the people who wanted to major in something that requires more math.
The elective credits were just silly and never meant much.
Very little has changed de facto. Some silliness was simply officially removed.