GCSEPod - www.gcsepod.com
Watch all of the revision pods (videos) and make notes to help you understand and remember each topic.
Test yourself using the multiple choice quizzes or assignments set by your teachers.
Hegarty maths - https://hegartymaths.com
Watch the tutorials, make notes and then practise as much as you can.
GCSE BBC Bitesize - https://www.bbc.com/bitesize/levels/z98jmp3
Watch the video tutorials and then try the revision quizzes.
Summarise each chapter onto a sheet of paper and then summarise each sheet of paper onto a flash card.
Keep repeating this process to increase your knoweldge of key concepts.
Use the check list at the end of chapter to ensure you are confident with all of the content.
Try the exam questions at the bottom of every page.