No offense but I believe that this process is a bit unfair. For example, if you're a bright student who goes to a low ranked school then your school might overestimate your performance, and hence you will not achieve the results that you want in the HSC. That has happened to a number of kids in my school.
If your exam mark is high then you won't be affected.
It is perfectly fair. Students who do well at a 'low-ranked' school should be gaining the highest exam marks from their school and these exam marks are used as the top mark for the range of marks.
e.g.
Student A - rank 1 - school mark 98 - exam mark 96 - moderated mark - 96
Student B - rank 2 - school mark 94 - exam mark 96 - moderated mark - 94
Student C - rank 3 - school mark 66 - exam mark 67 - moderated mark - 68
Student D - rank 4 - school mark 54 - exam mark 55 - moderated mark - 56
Student C - rank 5 - school mark 36 - exam mark 39 - moderated mark - 39
As the top mark and the bottom mark have been set by the exam marks the next step is to allocate the rest of the exam marks to reflect the rank AND gap.
Total exam marks to be distributed - 218.
Student B would get probably 95 or 94 - say 94 - keeping the GAP at 2 marks. Student C is 28 marks away and that would be reflected with a moderated mark of 70 and Student D is a further 12 marks away but also 18 marks ahead of 5th so the moderated mark would be close to 54.
The total number of marks awarded to the class is the same as the total number of marks awarded in the moderated process. The gaps have been maintained.
The only way a 'good' student is a poorly performing school gets a bad moderated assessment mark is when the school has over estimated how good that student is but the exam shows that the student isn't as good as the school thought. That isn't the student being scaled down due to a poorly ranked school but more the teacher stuffing up the assessment. The system is designed to stop teachers over estimating students. Without moderation teachers would simply send all students in with a mark of 100 and equal 1st.
Remember that the ranking of the school has absolutely NO influence of the marks awarded to the students as the schools are ranked AFTER the marks are done not before.