WACE assessment, explained

Your school mark and your WACE exam mark go through moderation before they become a course score, and then TISC scales it again.

A WA student's result touches three separate bodies before it reaches an ATAR: the school that marks the assessment, SCSA that moderates it, and TISC that scales it. Here is what each step actually does, and what it doesn't.

By StudyDesign AI editorial team. Drafted with AI assistance, then checked against SCSA's and TISC's published material, linked below. No teacher review is claimed.

Who marks school-based assessment

School-based assessment in an ATAR course is set and marked by your own teachers, against the grade descriptions in SCSA's syllabus for that course. It's a WA term, not a "SAC", and it covers the assignments, tests and practical tasks that run through Units 3 and 4. Your school reports a school mark for each course, which is the average of your assessment across those two units.

Marking standards differ between schools the same way they do everywhere, so SCSA runs a School Moderation Program that checks marking is applied consistently against the syllabus, before that school mark ever goes into your final course score.

How the school mark and the exam mark become a course score

For an ATAR course, your school mark out of 100 and your WACE exam mark out of 100 (the same paper, marked the same way, for every student in the state) both feed into statistical moderation. This is the step that puts your school's marking on the same scale as the exam, so a school mark from a school that tends to mark generously doesn't sit above a school mark from one that marks hard, once both are read against how their students actually performed on the exam.

A worked illustration, not real SCSA data

Say a school's top three students score 44, 41 and 37 out of 100 for school assessment in a course. On the WACE exam, those same three students score 39, 36 and 32. Moderation adjusts the school assessment marks toward the level the exam suggests, so the top student's school mark might land closer to 40 than 44. The order those three students finish in does not change.

The real calculation runs on the whole class taking the course, not three students, and these figures are invented to show the direction of the adjustment, not to predict a real result.

The moderated school mark and the exam mark are then combined into a WACE course score. Missing the external exam without an approved sickness or misadventure exemption means that course earns no WACE credit and contributes nothing to an ATAR, regardless of how strong the school mark was.

Why the course score isn't the number your ATAR is built from

The course score is not the end of the process for an ATAR course. TISC, the Tertiary Institutions Service Centre, applies a further step called Average Marks Scaling to produce a scaled score. Scaling accounts for how strong the group of students taking that particular course was that year, so a course score doesn't mean the same thing across two courses with very different cohorts. It's not a reward for a subject being difficult and not a penalty for one being popular. Only genuinely strong performance in a course scales well.

General, Foundation, Preliminary and VET results are never scaled and don't produce a scaled score at all, because only ATAR course results feed into TISC's calculation. If a student's mix includes any of those alongside ATAR courses, only the ATAR course results are relevant to a scaled score or an ATAR.

If you think the school mark itself is wrong

Moderation and scaling both work on the whole cohort after the fact. Neither one can look back at your individual response and change how it was marked against the grade descriptions. If you think a specific piece of assessment was marked incorrectly, that has to be raised with the school before results are finalised and submitted, not after.

Speak to the teacher who marked it and refer to the specific grade description you believe wasn't applied correctly, rather than the overall grade. Your school's WACE coordinator can point you to its own review process and the timeframe that applies, since the exact steps are set by the school rather than by SCSA.

What moderation and scaling do not do

They don't reorder you against your own classmates

Statistical moderation preserves rank within a school. If you beat someone on school assessment, moderation on its own can't reverse that.

They don't let you estimate an ATAR from your school marks

A school mark is not a scaled score, and scaling depends on how the entire state cohort in that course performed that year, which nobody at your school can see in advance. Any "rough ATAR estimate" built from raw marks is not something SCSA or TISC's own methods produce, so treat one from anywhere else the same way.

They don't require English to be one of your best subjects

Unlike some other states, WA's ATAR formula has no compulsory English subject among the scores it uses. English competency is instead a separate requirement most universities set for direct entry, commonly a scaled score of 50 or higher in ATAR English, Literature or EAL/D, with alternative pathways if that isn't met. It's an admissions requirement, not part of how the ATAR itself is calculated.

How the ATAR is actually built

TISC, not SCSA, calculates the ATAR. The Tertiary Entrance Aggregate behind it is your best four scaled scores, plus a 10 percent bonus on your best Language Other Than English scaled score if you have one, plus a 10 percent bonus each for Mathematics Methods and Mathematics Specialist if you have those, up to a maximum of 430. The ATAR itself is a rank from 0 to 99.95 showing where you sit against the state's Year 12 school-leaver-age cohort, not a percentage and not an average of your marks. You need at least four scaled scores to receive one at all.

This article won't estimate a TEA, a scaled score, or an ATAR cut-off for anyone. Those figures depend on cohort performance that changes every year and can only be calculated properly by TISC. The real method is published at tisc.edu.au .

What you can actually control

Moderation and scaling both run on numbers you cannot see or influence course by course. The mark you earn against the grade descriptions is the opposite. It is entirely about what you put on the page, and it happens before either of those processes touches it.

Get the actual grade descriptions for the task, not just the topic, and check your response addresses each one.
Sit every external exam your ATAR courses require. Missing one without an approved exemption zeroes that course's ATAR contribution outright.
Ask your teacher what a response at the top grade actually looks like for the specific task, not a generally strong answer.
If your school offers feedback on a draft, use it on the grade description you're least confident about.

Get the school mark right before moderation ever sees it

StudyDesign AI marks a practice response against the same kind of grade descriptions your school assessment is graded on, and shows you which one is unaddressed. It will not write the assessed task for you.

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