AP chem advice

Hi all,
I am currently in an AP chemistry course and I’m taking the AP exam in a few weeks. Last year, 70% of the kids at my school failed the exam, so understandably I’m a little bit nervous. I’ve done well in the class and understood the material, but because of the extremely low pass rate I feel like that’s somehow not enough. If you got a 4 or 5, how did you prep for the exam? My current plan is to briefly review my past textbook notes (as opposed to spending hours reading a prep book) and take all the college board practice tests that my teacher has. I also have a bunch of practice questions from my textbook and in Barron’s so I plan to use those too.

Go here for practice material official from Collegeboard:

http://apcentral.collegeboard.com/apc/public/exam/exam_information/221837.html