FAQ

The Higher School Certificate (HSC) is the credential awarded by NESA (NSW Education Standards Authority) to students who successfully complete Year 11 and Year 12. It marks the completion of 13 years of schooling and is recognised by universities, TAFE colleges and employers across Australia. The HSC provides a profile of your achievement across your chosen courses and, for those aiming for university, is the basis for calculating your ATAR.

Powerpoint slides with information that compare the HSC and ATAR

The Australian Tertiary Admission Rank (ATAR) is a number between 0 and 99.95 that indicates how you performed academically in comparison to all other students of the same age in NSW. An ATAR of 75, for example, means you performed better than 75% of your age group.

Your ATAR is based on an aggregate (combination) of scaled marks from your best 10 units of ATAR courses, which must include your best 2 units of English plus your best 8 remaining units. The aggregate (out of 500) is then converted into a percentile rank.

Two key components go into calculating the aggregate (combination):

1. Your school assessment mark — your internal school tasks ranked within your school cohort.

2. Your HSC examination mark — your performance in the external NESA exam, compared to all students in NSW taking the same subject.

Powerpoint slides with information that compare the HSC and ATAR

Different schools mark their internal assessments differently. To make school marks comparable across all schools in NSW, NESA applies a process called 'statistical moderation'. This uses the HSC exam results of students at your school to adjust (scale up or down) the school's internal marks so they sit on a common scale. Importantly, your ranking within your school cohort stays the same — moderation adjusts the marks but does not change who is ranked 1st, 2nd, 3rd, etc. within your school. This means your focus should be on doing as well as possible relative to your classmates in every assessment task.

Both matter equally. Your final HSC mark in each subject is the average of your moderated school assessment mark and your HSC examination mark — each contributing 50%.

However, it is worth understanding how your school assessment works for ATAR purposes: your internal tasks determine your rank within your school cohort. That rank is then used (after moderation) to assign you a school mark on the same scale as the HSC exam. This means that even if your school marks you generously or conservatively, what truly matters is how well you performed relative to your classmates. Staying as highly ranked as possible within your school is the key priority for internal assessments.

Not automatically. While harder subjects with academically strong candidatures (like Mathematics Extension 2 or Chemistry) tend to scale upwards, you only benefit from this if you perform well enough in that subject to receive a competitive mark.

For example, a student who struggles in Mathematics Extension 2 and receives a low mark may end up with a lower scaled mark than if they had performed strongly in Mathematics Advanced. The key takeaway: scale can help you, but only if your raw performance is genuinely competitive. Choose subjects where you can perform at a high level, not just because they 'scale well'.

Important note: Scaling varies from year to year depending on the cohort. 

No. You cannot assume that simply by studying more units your ATAR will be increased. While students who study more units tend to gain higher ATARs, there are a number of reasons why, such as each student’s interest, motivation, effort and time management. 

No. Your ATAR indicates your overall position; that is, how well you have performed compared to other students. It is a myth that choosing certain courses increases your ATAR. You can only maximise your ATAR by choosing courses you enjoy and do well in. Students who achieve high ATARs are generally placed near the top in all of their courses. 

No. This is one of the most persistent myths in HSC subject selection. NESA's scaling process is specifically designed to prevent students from gaming the system by choosing easier subjects. Subjects perceived as 'easy' typically have large, less-academically-focused candidatures, which causes them to scale downward. Choosing subjects strategically for perceived ease tends to backfire. Choose subjects where you genuinely perform well — that is the most reliable path to a strong ATAR.

HSC scaling is the process of converting your raw HSC marks into scaled marks so that performance across completely different subjects can be fairly compared. Without scaling, it would be impossible to fairly compare a student who scored 90 in Mathematics Extension 2 against one who scored 90 in another subject — the candidatures, difficulty levels and competition vary significantly.

The purpose of scaling is to ensure that students are neither advantaged nor disadvantaged by their choice of subjects. The scaled mark estimates what your mark would have been if all students had studied all courses. Scaling is carried out by the Universities Admissions Centre (UAC) and is done fresh each year.

Scaling should not be the primary reason you choose a subject, but it is worth understanding. The most important factors in subject selection are:

1. Your genuine interest and engagement with the subject

2. Your current ability and capacity to perform well

3. Whether the subject is required or recommended for your intended university course or career pathway

4. Whether the subject suits the type of learner you are (exam-based, project-based, etc.)

Once you have narrowed your choices based on those factors, it is sensible to consider scaling — particularly if you are genuinely capable in two similar subjects and one scales meaningfully better. But choosing a hard subject you are not prepared for, hoping for a scaling boost, is a common and costly mistake.

Your raw HSC mark is the average of your examination mark and your moderated school assessment mark — essentially what you actually scored out of 100 in the subject.

Your scaled mark is what that raw mark becomes after UAC applies the scaling algorithm to adjust for differences in the difficulty and candidature of each subject. Your scaled mark out of 50 per 2-unit subject is what goes into your aggregate (out of 500), which determines your ATAR. Your ranking within your subject does not change through scaling — it only affects the value of the marks, not who is ahead of whom.

Courses have to be scaled so that marks in different courses can be compared with each other. Courses are scaled using the mean scores and distribution of marks, which indicate the ability of the students taking the course (not the perceived difficulty of the course).

Courses such as Mathematics Extension 2 and Physics traditionally scale well because students who take these courses generally perform well in all their courses. The purpose of scaling is to rank students according to their overall achievement. Therefore, to get a high ATAR, students must achieve high HSC marks and high positions in all their courses.

Not on its own. Scaling advantage only benefits you if you are genuinely competitive in that subject. A mediocre performance in a high-scaling subject will not help your ATAR, and may harm it compared to a strong performance in a slightly lower-scaling one. The most important thing is choosing subjects where you will perform well and be engaged. Scaling is one factor to be aware of — not the driving force behind your selection.

Here are further links you can access to find more about scaling https://uac.edu.au/future-applicants/atar/how-your-atar-is-calculated

https://uac.edu.au/media-centre/news/atar-myths-busted

Assessment moderation is the process NESA uses to make sure your school assessment marks can be fairly compared with students at every other school in NSW — even though every school sets different tasks and marks them differently.

Here's the key idea: your school marks aren't compared directly with another school's marks. Instead, NESA uses your school group's HSC exam results as a common yardstick, and adjusts everyone's school marks against that yardstick.

How it works in three steps:

1. Your school submits each student's total school assessment mark to NESA — this reflects your rank and performance relative to classmates.

2. NESA looks at how your whole school group performed in the external HSC exam, and uses three anchor points — the top mark, the average, and (where possible) the lowest mark — to shift the school assessment marks up or down so they sit on the same scale as the exam marks.

3. Every student's moderated mark is recalculated using this adjusted scale — but crucially, your rank order and the relative gaps between you and your classmates never change.

Further information can be found in these powerpoint slides as it is a complex process.

Both courses develop critical reading, writing and communication skills through the study of a range of texts, including novels, poetry, film and media. The key differences are:

English Standard is designed for students who want to develop their literacy and communication skills in an applied, real-world context. It covers a wide range of text types and focuses on practical communication. Assessment includes essays, creative writing, multimodal tasks and a 2-hour HSC exam.

English Advanced is a more academically rigorous course that involves deeper analysis and critical interpretation of complex texts. It requires sophisticated essay writing and an ability to engage with abstract ideas. Assessment also includes essays, creative writing, and a 3-hour HSC exam.

English Extension 1 (Year 11 and 12) and Extension 2 (Year 12 only) are available to strong Advanced students who want to pursue English at the highest level.

English Advanced does scale meaningfully better than English Standard, particularly for students who perform above the median. However, this does not mean Advanced is the right choice for everyone. If you are genuinely better suited to Standard English and would perform more strongly there, that may produce a better outcome for you than struggling in Advanced. 

Still struggling to decide? Your English teacher is the best person to ask. They know your current ability, your strengths and weaknesses as a writer and thinker, and they know both courses well. Your careers adviser can also help you consider whether your intended post-school pathway has any preference or requirement for a particular English level. Be direct and ask: 'Which English course do you think is the right fit for me?'

Mathematics Standard is designed for students who want to continue developing their mathematical skills with a focus on real-world applications — including financial mathematics, statistics, measurement and data analysis. It is a challenging course in its own right and moves at a fast pace. There are two versions of the HSC level course: Mathematics Standard 1 (non-ATAR) and Mathematics Standard 2 (ATAR eligible).

Mathematics Advanced is a calculus-based course that covers algebra, functions, trigonometry, differentiation and integration. It is more abstract and theoretical than Standard and provides the mathematical foundation required for many STEM degrees. It is the prerequisite for Mathematics Extension 1.

Both courses are demanding. Mathematics Advanced involves significantly more new mathematical content, particularly calculus. If you are genuinely strong in mathematics and aiming for a science, engineering, technology or economics degree, Advanced is typically the recommended path.

Historically, Mathematics Advanced has scaled better than Mathematics Standard, and Extension 1 and Extension 2 scale even more strongly. However, recent curriculum changes mean that Mathematics Standard and Advanced now share common content and exam questions (Paper 1), meaning their marks can be directly compared more fairly than before. Some previous advice about Standard scaling poorly is no longer as straightforwardly applicable.

The bottom line: choose the course that best matches your current ability and future needs, not based solely on scaling. A strong performance in Standard can produce a very respectable ATAR contribution.

Mathematics Extension 1 builds on Advanced and includes more advanced algebra, proof, vectors and combinatorics. It is a co-requisite with Mathematics Advanced. It scales very well and is recommended for students intending to study engineering, physics, actuarial studies, mathematics or computer science at university.

Mathematics Extension 2 is a Year 12 only course and is one of the most challenging HSC subjects available. It scales exceptionally well — a student ranked in the 52nd percentile in Extension 2 can receive the same scaled mark as a student ranked in the 98th percentile in Mathematics Advanced. However, it requires strong extension of abstract mathematical thinking and significant commitment.

If you are considering Extension, ask your Maths teacher directly: 'Am I ready for Extension 1?' Their honest answer is the most valuable advice you will receive.

Speak to your current Mathematics teacher and ask them directly: 'Am I in a good position to take on Mathematics Advanced?' It can feel like a confronting question, but it is exactly the right one to ask. If you are on the borderline, also ask: 'What could I do over the coming months to be as ready as possible?' Your teacher's answer — combined with advice from your careers adviser about your intended pathway — will give you the clearest picture of which course is right for you.

Most students study 10–12 units, which typically equates to 5 or 6 subjects. Studying 12 units gives you a buffer — if one subject does not go as planned, it may not count towards your ATAR. However, studying too many subjects can spread your time and effort too thinly. Talk to your teachers and careers adviser about the right load for you based on your strengths, interests and extracurricular commitments.

Start by asking yourself:

• What subjects do I genuinely enjoy and engage with?

• What am I currently performing well in?

• What do I want to do after school — what university course or career interests me?

• What subjects are assumed knowledge or recommended for that pathway?

• What type of assessment do I thrive in — exams, projects, performances, practicals?

Check the UAC (University Admissions Centre) guide at uac.edu.au to look up the 'assumed knowledge' and 'recommended studies' for the university courses you are considering. Then consult your teachers and careers adviser to refine your selection.

Yes, but before you drop an HSC subject, ask yourself the following questions:
■ Will I still be eligible for an ATAR?
■ Is it a prerequisite for a university course that I might want to study?
■ Is it assumed knowledge for a university course that I might want to study? 

That is completely normal — most Year 10 students do not have a firm career plan, and that is okay. A good approach is to:

• Choose subjects you are genuinely good at and interested in, as you will perform better in them

• Keep your options broad — avoid closing off too many pathways unnecessarily

• Include at least one rigorous academic subject in each key learning area if possible

• Speak to your careers adviser, who can help you explore interests and strengths and identify patterns in what excites you

Your subject choices do not lock you into a career forever. Many pathways remain open even after the HSC, through bridging courses, TAFE, university access schemes and alternative entry programs.

If your weakest subject is one of your 10 units that contributes to your ATAR, it will bring your aggregate down. This is why studying 12 units (rather than exactly 10) provides a useful buffer — if one subject underperforms, it may not need to count. Your 10 best units (including best 2 English units) are automatically selected for your ATAR calculation. Focusing on doing your best across all subjects, and seeking help early if you are struggling, is always the right approach.

Year 11 (Preliminary) results do not count directly towards your HSC or ATAR. However, Year 11 is critically important because:

• The content lays the foundation for the HSC course — poor foundations make Year 12 significantly harder

• The habits, study skills and routines you build in Year 11 carry directly into Year 12

• Your internal school assessment ranking begins being established from the start of your course

• Some schools use Year 11 performance to place students in particular streams or to advise changes to subject selections

Treat Year 11 seriously — it is your preparation year for the HSC.

'Assumed knowledge' means a university course assumes you have studied a particular HSC subject. If you have not, you may find the first year significantly more challenging and may need to do bridging work. 'Recommended studies' are subjects that would be helpful but are not strictly required.

For example, most engineering degrees assume Mathematics Advanced (and often Extension 1) and Physics. Medicine typically assumes Chemistry and Biology. You should look up your specific courses of interest on the UAC website or the websites of the universities you are considering, and factor this into your subject selection.

No. While the ATAR is the most common pathway for school leavers, universities offer a range of alternative entry options, including:

• Early Entry Programs based on school-reported results, interviews or portfolios

• Equity and access schemes for students from disadvantaged backgrounds

• Bridging courses or enabling programs

• TAFE qualifications and diploma pathways

• Mature age entry and work experience

Some degrees also require additional requirements alongside the ATAR, such as auditions (music, drama, art), interviews (teaching, social work), or subject prerequisites. Check the specific requirements for courses you are interested in via the UAC website and individual university websites.

Some VET courses can help you get an ATAR if you do the optional HSC exam (not all VET courses have an exam). Board Endorsed Courses do not count towards your ATAR. Check the curriculum handbook to make sure your subjects meet the requirements for the HSC and ATAR.