Well i'm doing 3 unit at the moment and i must say i'm not doing that great at all... but i haven't been studying to be fair. In the last few years i have mainly been just coasting and getting easy 85%'s and 90%'s and this year i haven't been studying that much for 3 unit and i'm only getting like 76% and 61%. I reckon i COULD do 4 unit, i would obviously have to pick up my game for the rest of year 11 and get 95'5 by studying heaps and heaps.. but i think it's possible. What do you guys think? also, if anybody has done 4 unit or is undertaking it, is it THAT hard? my mum told me the concepts in 4 unit are insane to understand. i would probably be willing to put in 2 hours of maths a DAY, allocating other time to study for other subjects