Combinatorics (permutations and combinations) is kinda confusing, the teacher was teaching all this coefficient and term stuff (pretty sure it's not even on our test) and half the lesson was so confusing, I don't think anybody did any homework bc it was in Cambridge and we use MIF at school.
How's sor2 for you?
i mean most of it is just content we need to memorise for our exam, so it all comes down to structure I guess, which I need to improve because its quite different than what my teacher expects (hopefully I don't jinx myself)