If you have a look back on page one I've posted it on there!
Okay, I've posted about English Lang and some Lit on the previous page also and physics in detail but I can give some tips on bio and chem here!
I studied AQA higher papers also for all three sciences with (Phys= 9, Chem = 9 and Bio=8) {In my last set of mocks at least}
Chemistry:
Honestly for chemistry, I HIGHLY recommend doing past papers as you get used to the format the questions are portrayed in but also what the mark scheme is wanting (
I know I used to write way too much when the answer required was one sentence haha). Another thing I did (for all three sciences) made Cornell notes on each page from the cgp revision guide (you NEED to get these if you haven't already they are lifesavers). These were really helpful as well as flashcards which I could go over the night before an exam and even bring to school to quickly revise before an exam. Especially, for chem, I would recommend getting a largish flashcard and writing all the test (test for carbonates, co2 test, oxygen test, flame tests, precipitates test etc...) answers on it as I tended to bring these ones to school before an exam to quickly memorise so I could blurt them on the front page of my test as soon as it began. I also REALLY recommend freesciencelessons on youtube for chem as he allowed me to understand each topic (you need to understand it before you revise it as it makes revision 1000x easier) in simple details. Primrose kittens full topic/paper run-throughs for science were really useful for me to do the night before an exam and I also recommend physicsandmathstutor (website) to gain access to past paper questions.
Bio:
Once again PAST PAPERS as the mark schemes are quite specific for bio so if you learn what kind of answers they want it should be easier for you to give them. I also recommend (for all sciences) making flashcards for each practical as there always HAS to be at least one practical question in each paper which is usually 6 marks but could also have some 2 or 1 markers on safety features etc.. You also need to be able to apply topics you have learnt to questions that may seem unfamiliar so my tip here is to just really think about what the question is asking and how to go about answering it (think logically). For bio, the Cornell notes worked best for me but you'll need to figure out what works best for you (flashcards, blurting, mindmaps etc..)
Hope this helps! Any more questions I'm more than happy to answer.
(I know someone who studied GCSE history who got 9's if you want me to ask them to write you an answer for revision tips on here?)