yeah some people perform considerably well or badly for their standards in the HSC so dont worry too much about it stoygen. i screwed the possiblity of 93 in chem with a 87 exam mark. assessment gave me a 93
got 81 in exam ( not too happy, tho i thought i'd fail cuz i missed out the whole chem of art topic and had to teach it to myself....chelated ligands anyone?) and 89 for assessment leaving me with 85, which is pretty good considering i hate chem