I'm in year 11 currently. If i do the 2 unit HSC Mathematics course this year (ie. accelerated) and then do 4 unit Mathematics next year (i.e. 3 and 4 unit exams), will my 2 unit results be counted towards my HSC mark?
If you accelerate 2 Unit Mathematics, but then later attempt the Mathematics Extension 1 and Mathematics 2 courses, then 2 Unit Mathematics will still be recorded in your HSC Record of Achievement, but it won't be included in calculating your UAI.
Actually, once you have sat your Ext 2 exam in Mathematics, your 2u Mathematics marks will cease to exist for all practical terms regarding the UAI- even if you perform worse in 4u than 2u. The reasoning for this is that 2u maths is asssumed knowledge for the 4u course and effectively becomes like your prelim.