Make sure you get about half of the problem set done before the homework check (and do your lab reports lol) and you’ll be totally fine. Don’t try to turn things in late. He lets you drop your lowest lab report grade for the quarter which is really nice. The problem sets prepare you for the unit tests really well and he’s always available during flex. A lot of the formulas you’ll need are on the reference tables and he is really good about communicating what isn’t on the reference sheet. Anything you’re worried about forgetting you can put into your calculator (he’ll straight up tell you some of the stuff you should probably put in your calculator). Even if you feel like you aren’t doing well on the tests I guarantee if you have mr allen you’ll be more than prepared for the ap exam.