Hopefully u carry on thinking this way coz I’m doing my GCSES right now and I was thinking the same when I was in year 10.
Tips from me are basically read over what u have done in lesson that day at school so u understand it better. Just go over ur notes from class and read over the chapter in ur skl guide book or any other revision guide u have. (This will probably take u 10-15mins max for each subject uve had that day at skl) If u don’t understand then go ask a teacher or look online but make sure u understand it straight away (coz I’m teaching myself things my teachers failed to teach me since the past 2 years). Go on websites like get revising, BBC Bitesize, cliff notes and shmoop for English, and Kerboodle (if ur skl pays for that), mathswatch, maths genie, Corbett maths, on YouTube there’s freesciencelessons and mygcse, Quizlet
Also make flash cards everyday after skl for the things u learnt so if u do like a bit of a chapter from biology in skl that day make notes or flash cards when u get home when it’s fresh in ur mind so u don’t have to do it b4 ur exams
Hopefully that’s helped u but basically learn the content as u go along coz then u don’t have to learn it all a few weeks b4 ur exams like I am right now 😒