A levels are a huge step up from GCSE, I did minimum revision for them and walked out with decent grades, my mocks at A Level were very different. The minimal revision did NOT pay off, and I had to significantly up my game. I’m now about to sit my exams stressing about how much revision i’ve done because I need to get particular grades for university. I even stayed back a year to do better, which did help, but I definitely could’ve done more to upkeep this. Teachers also play a critical role as they deliver the information to you. Two of mine are amazing and the other is absolute s**t. Use the website Save My Exams to use the notes provided to write out exam answers, I’m sure your teacher would be happy to mark them all for you.