guys just sat alevl biochem and maths and was predicted an a* in all and found the exams quite a walk in the park so if you want ill give you 2 tips . 1. Hard work pays off , ill be 100% real with you if you don't put the time in you deserve doing as bad as you are , trust me everyone single micro problem you have right now (e.g can't work out how to draw the right hess cycle ) will be solved by time , just endless hours put in . Nothing in level is hard it just needs hours on work put into it 2.Use exam papers , ur final exams determine 100% of your grade , not how well you know the biology textbook . Take Skelton notes of the biology content , waste as little time as possible on notes , always make your notes before you go through the topic in school so the lesson is just revision , start exam papers at easter time minimum or say goodbye to anyway A / A* dreams . I personally finished all 3 major exam boards papers for every subject and know many like me who did the same , these exams are slightly luck / probability based but every exam paper you do that probability of them catching you on a little quirk they have up their sleeve goes down by a tiny % until finally its impossible for you not to get A* in papers . I hope this didn't sound arrogant and let if be happy to help with any other more specific problems .