Free resources for GCSE SubjectsWatch
Although some of the exam boards of the resources may not be applicable to you, you can incorporate the relevant information into your own materials/resources like I tend to do as having various resources phrase aspects differently can broaden your understanding overall.
I also have lists of YouTube channels and websites that are available for each subject which have been a great help with my revision too.
English Literature - AQA
and edexcel maths please.