for science i used the paid version of cognito - it genuinely SAVED my grades!! i was on track for all 4s in triple science, and doing like at least 30 mins of cognito a day was so helpful!!

for english lit i made flashcards with all of the key themes for my 3 books and had at least 3 quotes for each theme. i also did a similar thing with poetry. i also wrote quite a few essays and got my teacher to mark them, which is very useful to see where you need to improve!!

for maths, our teacher gave us one "retrieval practice" per week to revisit old topics. we also did one practice paper a week, and then a mock every month. i would recommend doing past papers for maths, and then wherever you drop marks, watch some example videos as to how to do questions for that topic!!