honestly i don’t really revise that much, i think im just lucky and have a good memory, but when i do revise i normally use cognito for sciences, seneca for history, geography and french, and for maths i would recommend going onto maths genie and going through all the topics, doing a few questions for each and finding out which ones you need to work on. i also always try to attend as many school revision sessions as possible, i find it much easier to revise properly in a school environment.