A level maths revision using old spec papers

I was wondering if I could use old spec papers to revise a level maths, and which ones would be most effective to use, since I want to maximise the short amount of revision time we have left for a levels.

What’s your exam board? I did Edexcel and we used some old spec papers. I can’t remember what they were though. My teacher told us to just do as many questions as possible, even if they’re from old spec papers. Just don’t panic if you come across something you’ve never heard of!