There are some words that people use incorrectly.
Scaling refers to the process done by the UAC that scales your raw HSC mark.
Moderating is a process done by the board of studies to ensure that the internal assessment mark for each student is fair throughout the state (i.e. remove inconsistencies that result from varying levels of difficulties in exams/assessments by the School).
Aligning is the process done by the Board of Studies that involves 'categorising' students into specific bands to show achievements that have been met.
A flowchart here will describe the processes
http://www.boredofstudies.org/other/flowchart.pdf