At the beginning of Year 13, one of my chemistry teachers retired and was replaced with a new teacher who had just begun who, to put it lightly, has no idea what she's doing (I am NOT blaming her for my performance in the subject, but I feel it's necessary to stress that she's inexperienced at both theory and practical lessons).
In short, my chemistry exams are in June and I have found myself struggling with the entirety of her side of the course and, when I get stuck and ask her about something via email, she either responds to me in person next lesson (which are once a week) by basically doing the work for me, or not respond at all, she will also simply mark any incorrect work as wrong while providing no actual information.
Is there any advice aside from grinding out past papers that would help me in my position? I only need a B, which is ~50% according to my other teacher based on previous grade boundaries.
Thanks in advance