For Pupils in Years 7 to 11, I find the “bread and butter” cards on JustMaths really useful – entertaining, and a broad range of revision topics.
Easier (basic skills) stuff is on this page:
and harder stuff (Grade C+, I use these in Years 10 and 11) is:
justmaths.co.uk/bread-and-butter-grade-c-and-beyond/
Thanks Mel!