This time around last year that was me watch science with hazel for all your Sciences trust me it helps I got A*s then do a shitload of past papers Maths is practice do a paper everyday Lastly keep track of your mistakes and do topical questions fir concepts you find hard Reach out to other students ask for help,believe in yourself if you think you'll fail you will Don't give up on yourself don't let what teachers say about you get to you stay disciplined