year 11 student here!
i cant say much for english literature or french because im at around a 6-7 too, or triple science because i do double, but for business i'd really suggest learning the structure of questions really well (especially 6 markers) and doing a lot of practice questions, in addition to making sure you know the pros and cons of everything well (i got a 9 in my last business mock paper 2 mock, but i also do the AQA examboard so im not sure if its the same for you). also for finance, make sure you know all your formulas and stuff
for maths, i really suggest websites like dr frost and mathswatch (i got an 8 in my last two mocks, and i do the pearson edexcel exam board) do questions that you know you're going to struggle on, and ask your teacher questions about everything you dont understand because it really piles up if you forget to ask. if you arent comfortable asking your teachers, you can also look up videos on youtube or mathswatch sometimes has a video explaining the topic if you scroll down on a question (dr frost has this too but its a button in the top left corner of a question)
for geography, i'd say make sure you know the question structure and content because there's a lot of it. to get a 9, i'd probably use some statistics from case studies (im normally around an 8 at geography, but i almost got a 9 in my last mock because of stats and stuff. i do the AQA examboard) also, make sure you know the command words and what each question is expecting, whether or not they want a conclusion, etc. also, because there's a ton of case studies, it'll be helpful to have a conclusive list of all of them! i forgot about my desertification case study entirely in one of my tests once because we only did one sheet on it and i skipped over it when i was making flashcards from my notes
but if you're comfortable, i really suggest asking your teachers specifically for help for more practical advice because they know you best and what areas you might specifically struggle at. im literally just some stranger on the internet and there's no guarantee what i'm saying is helpful for you.