If you are only working in class that is not enough, revise at home or in a library. For biology and chemistry I would read through the toughest subjects in your revision guide and as you go write or type questions on what you’ve read and answer them after, it’s the quickest way I’ve learnt to retain information and if you do it on your phone you can test yourself when you’re on the bus or waiting somewhere. Past papers are also good to test your knowledge and figure out where you need to improve. Also your maths grades will get better as you go further into the year most of what you’ve learnt is not the full paper or it’s at a foundation level. Past paper solutions from Maths Genie on YouTube are good, so are channels Freesciencelessons and Fuseschool for the sciences. Good luck you’re in a good place for 6/9 subjects considering your predictions.
Honestly predictions don’t mean anything you can surpass them. Just because someone has higher predictions doesn’t mean they’ll get it. Most teachers wrong anyways, you will progress.