For general Maths support students can use the following websites:
5 random questions: https://corbettmaths.com/5-a-day/gcse/ - use Numeracy, Foundation or Foundation Plus.
Games: https://www.mymaths.co.uk/ - school login details are 'wirralhs' and password 'radius'. Students can then access materials as a guest, even if they don't know their My Portal details.
For specific topics students can use the following websites:
Revision, tests & video clips: https://www.bbc.co.uk/bitesize/examspecs/z8sg6fr - AQA
Interactive lessons and worksheets: https://www.mymaths.co.uk/ - log in details as above
Videos, practice questions and textbook exercises (answers are also available): https://corbettmaths.com/contents/
Specific topics are as follows: