Heyy im also a year 11, here are some things that have helped me:
•maths- use maths genie, it’s so helpful it has practice questions and videos! Each topic is graded aswell
•science- past paper questions(on specific topics) on the website physics and maths tutor. Also watch free science lessons or cognito YouTube vids for understanding content
•English literature- watch analysis videos on YouTube, they help me analyse specific themes/characters/poems and after watching only a few, I learnt how to analyse with better language and depth too.
•English language- just practice, find example descriptions online and put them in ur writing, get it marked and continue doing it. Then start writing in timed conditions, you can use phrases from all your practice essays. Make sure you get your practice essays marked and get feedback!
Hope this helped💕 this is what I did before my year 11 mocks to get me atleast two grades higher than all of my year 10 mocks