How to make a revision timetable?Watch
Sorry for this long reply.
It really comes down to what you need it for. It's there to help you, so we can't really recommend how you should make one. I would say, some people turn exam timetables into a distraction and spend a lot of time agonising over them. Mine never went beyond having a list of things to do that day, with no hour by hour planning. If you're completely lost as to how to start one, it might not help you.
I found they were useful for pacing myself with past papers and equally making sure I'd done enough. This was at A-level though, didn't do any at GCSE.
Timetables never worked for me -i used to think unrealistically thinking straight after school I'll revise at 4:00pm but it took me an hour eating (settling in as soon as you came back from school) then saying i'll finish this subject in 2 hours when it would actually take the full night.
I found it hard to revise 3 different subjects on the same day I would always stick to 1