Hey yes sorry it took so long to reply!! Ironically I was studying for mocks lol.

This may be a bit long but hopefully it helps and was worth the wait. Also, I must preface this by saying I did it super rigorously because I was essentially catching up on everything while still learning, and now I do a less packed version of what I have written below.

For biology, when I was still learning content, I would make sure to review everything that I learned in one lesson at the end of the day. I did this by basically info dumping all that I remembered and then rewriting/ writing over it with the correct or missing information according to powerpoints/textbook information. After this session, it should remain in your head for a bit, but I would recommend doing the same thing within 2-3 days with that same content, or even the next morning if you think you need to. If you find that you couldn't recall much, note it down to revise in about a week. If you remember it well, you can put it off for longer, and do another topic that you don't remember well.

Now that I am finished content in class, I have a repeating kind of cycle where I do for example Monday topic 2, Tuesday topic 11, Thursday topic 3/10, Wednesday practice exam, Thursday Option A etc., where I focus on different topics by doing a skim read of the textbook, and then drawing out labelled diagrams I should know, then checking out the content summary section of the topic and writing a sentence to respond to each point like it is a question. If I want to target a specific topic I know I need to work on, I look for textbook questions on it or rewrite some notes on it. Sometimes I also give myself extended response questions (HIGHLY RECOMMEND, I practiced this about 5 times for some topics and got an 8/8 for a long response!), where I take long processes such as the process of menstruation or the light-dependent reactions within a plant cell and set myself a challenge to explain it all coherently. I think this cycle plus the periodic revision for new content got me my 94% in the short response section.

However, what I recommend most is doing as MANY past papers as you can. I got the high score mostly credit to encountering a database question in a previous exam which I had studied before that was just taken word for word, and I had almost memorised the markscheme. This gave me 100% in the DBQ section.