VCE Stuff > Victorian Technical Score Discussion
I DONT GET THESE SAC CRAP TOO CONFUSING HELP!!
costargh:
That was the situation for me in Legal last year ( A+ A+ A) and I got a 40. That would probably be the best case scenario. I think 38,39 would be more common
moshi:
i thought your ranking gets boosted with a high exam mark - doesn't vcaa treat you like an exception to your school's results if your exam result is (for example) an A+ when your ranking is in the middle of your cohort?
cosec(x):
There is a page on statistical moderation on the VCAA website explaining it (though poorly). Essentially, your exam mark will influence your SAC mark. This occurs because your SAC mark is what undergoes moderation. This means that your grade in you cohort translates to be the grade you would have gotten regardless of what school you went to. look on the VCAA website to see it fully.
Mao:
--- Quote from: moshi on June 06, 2008, 06:22:25 pm ---i thought your ranking gets boosted with a high exam mark - doesn't vcaa treat you like an exception to your school's results if your exam result is (for example) an A+ when your ranking is in the middle of your cohort?
--- End quote ---
from my knowledge, the only cases when your results are removed from the cohort is when you apply for derived exam scores, otherwise your ranking stays the same.
chem-nerd:
Your SAC ranking will NOT change no matter what your exam mark is. You DO keep your own exam marks.
Students can be excluded if they: miss a SAC, do much worse on their exam than their sac marks would indicate, get a derived exam mark, change schools halfway through the year (and i think a few more but i've left the info at school)
Your exam mark (and other information such as your GAT score) will then be used to determine an external score. This external score is basically an indication of what anyone who received that exam score got as their coursework (SAC) score across the entire group of students doing that subject.
These external scores are then ordered from highest to lowest against your cohorts rankings (ie SAC rankings given by the teacher) and locked in at particular points (max, upper quartile, median, and lower quartile) and a quadratic formula is then applied to align your cohorts given SAC marks against the calculated external marks. Once the quadratic formula has been decided, it is applied to ALL students in the cohort, including those initially excluded.
(in simple terms, the highest ranked student gets given the highest external mark which was calculated from the highest exam mark which may or may not have been their own exam mark)
http://www.vcaa.vic.edu.au/vce/publications/vcebriefpresent30-04-08.pdf
the last few pages of this have three examples of different cohorts of the same subject. The first is a 'small' (<16) moderation group so is only locked in at the max and median. this is an example of a group that had 'harder' sacs and so all of their sac marks were standardised up.
the second is a 'large' moderation group and so is locked in at 4 points. this is an example of a cohort which generally had 'easier' sacs (or perhaps they weren't very good at sitting exams) and so their sac marks were standardised down.
the third example is a common question of what would happen in an average to low cohort with one brillliant student. In it you can see (hopefully) that the high achieving student is not disadvantaged by a lower performing cohort.
In short, you want to achieve the highest ranking you can so you aren't disadvantaged by a poorly performing cohort. You also want well designed, medium to hard level sacs that dont result in all the marks being bunched together.
I hope this has made some sense. I may need to edit later.
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