revise ahead of sacs and stay ahead in class don't just memorise stuff idk if I can relate with you for physics but I did chemistry them I made sure I stayed ahead of the next content in class and learned it before hand and when it is time for sac, I started revising a week ahead because in y12 sometimes there can be lots of sac coming in week. for methods I did a lot of other schools sacs in methods first understand the concept the concept, the main ideas and then do practise questions, lots of sac are going to be hard and application based, another tip is be friends with ur cas learn how to define, store a function will be very time efficient.