so im in my AS year and doing a level maths. Theres 3 exams, core 1, core 2 and stats. Core 1 and stats I'm getting solid Bs and As in, however today at college we did a core 2 mock and i left half way through crying, i couldn't answer one question!!! whenever i try to do past papers i don't even know where to start for core 2, and when revising i just cant do it. We have a different teacher for core 2 than we have for core 1 and stats and she is absolutely crap!! once she was teaching us in lesson and said to the class 'I'm really nervous about doing this question so bare with me'. I know I'm going to get a U in core 2, what can i do to change this?