I enjoyed writing my solutions to the 2017 AP Physics 1 free response questions. You can find the questions linked via the official College Board exam site, here.
I very much like the direction the "quantitative-qualitative translation" question has gone. Twice, students were given an equation, and asked why it does or does not make physical sense. That's such a great skill to develop, and to test. And I loved the experimental question... the experiment itself was quite straightforward. But the "based on this data, how do you feel about this conclusion?" question was amazing. It gets at the heart of evaluating quantitative evidence, at basic numeracy. If every journalist and politician in America could answer this question accurately, the world would be a better place.
Okay, now I'm going to link the solutions. But, please note that due to College Board copyright rules, only teachers can access them. The PGP-secure website requires verification that you are a teacher in order to sign up.
One of my favorite people, Gardner Friedlander, runs this teachers-only wiki. He became quite frustrated last year because so many students asked for access -- many pretended to be teachers. Folks, Gardner isn't stupid. He verifies that you're a teacher. Please don't make him come after you for impersonating a teacher -- he will take away your birthday.
So, students, do you want access? Ask your teacher to join PGP-secure. Your teacher may share the solutions "for face-to-face teaching purposes."
As always, I guarantee that I've earned a 5, but not that I get every detail right. Please note my mistakes in the comment section.
My solutions can be found via this link, at PGP-secure. This is a wiki for physics teachers only. If you are a teacher but don't have access yet, follow the instructions at the linked page; you should be approved in a few days.