+1Other then English and Mathematics, how you do in prelim's isn't that important.
A fair few people accelerate 3U and do well/fine in preliminary as well as the HSC subjects they are undertaking.
I disagree. Maths Extension 1 is unique in the aspect that HSC topics are just added on top of Prelim and are completely different. There are bound to be topics that you'll struggle with in Prelim like 3D Trig and/or Circle Geo but you can do all the HSC topics even if you struggle with prelim just fine. (story of our class' 3 unit exam)Think 3U (Extension 1) you need the full 2 years to conquer it. If you pissed around/didn't perform well in Prelim/Year 11 you have a big obstacle in pulling it back. Personally think its important to do well in Year 11 to be able to do well in Year 12. .