Choosing your HSC subjects is one of the most important decisions you will make. Get it right and you set yourself up for a stronger ATAR, more enjoyable study, and a clearer path to university. Get it wrong and you can find yourself grinding through subjects you dislike, underperforming, and ultimately hurting your results.
This guide walks you through everything you need to consider when selecting your HSC subjects, from unit requirements and scaling, to your strengths, interests, and university prerequisites.
Start With the Rules: What You Must Study
Before thinking about what you want to study, you need to understand what you are required to study.
To be eligible for the HSC, NESA requires you to complete:
- A minimum of 12 units in Year 11 (the Preliminary Course)
- A minimum of 10 units in Year 12 (the HSC Course)
- At least 2 units of English — this is the only compulsory subject area
Only your best 10 units will count toward your ATAR, so most students carry 11 or 12 units into Year 12 as a safety buffer. If you do poorly in one subject, the extra unit means it simply does not get counted.
Most subjects are worth 2 units. Extension subjects are worth 1 unit on top of the corresponding 2-unit course. You cannot study both Maths Standard and Maths Advanced version of the same subject (e.g. you cannot do Maths Standard and Maths Advanced simultaneously). This is the same with English Standard and English Advanced.
Step 1: Check University Prerequisites
If you have a specific university course in mind, your subject selection needs to work backwards from there. Many degree programs have assumed knowledge or hard prerequisites that will disqualify you if you haven't studied the right subjects.
If you are uncertain, it is always good to keep your options open by completing subjects that can get you into the course you are considering
Common examples include:
- Medicine, Dentistry, and allied health: typically require Chemistry and often Biology
- Engineering: typically requires Maths Advanced (and often Extension 1) and Physics
- Law and Commerce: no hard prerequisites at most universities, but Maths and English Advanced are strongly recommended
- Architecture: often lists Maths as assumed knowledge
Check the specific admission requirements on each university's website, or through UAC (Universities Admissions Centre), before finalising your selections. Do not leave this step until after you have picked your subjects, finding out too late that you are missing a prerequisite is a costly mistake.
Step 2: Choose Subjects You Are Good At and Enjoy
This sounds obvious, but it is the most consistently underrated piece of advice in the HSC subject selection process. Students are frequently tempted to pick subjects that "scale well" at the expense of subjects they actually enjoy and perform in. This is usually a mistake.
Here is why: scaling adjusts marks upward for difficult subjects, but only if you score well in them. A 75 in Chemistry after scaling may end up contributing less to your ATAR than a 92 in Business Studies. The scaling system is not a shortcut, it rewards students who are genuinely strong in demanding subjects.
At the end of the day, the HSC can be really hard. If you are not doing subjects you enjoy, you will neglect it and then resent it. This is not a combination for doing well.
The best-performing HSC students almost universally study subjects they find engaging. Interest drives effort, effort drives marks, and marks drive your ATAR. When choosing your subjects, ask yourself:
- Which subjects have I consistently performed well in throughout Years 9 and 10?
- Which subjects do I find genuinely interesting, even when the content is challenging?
- Which teachers do I work well with? (Your teacher follows you from Year 11 into Year 12 for each subject)
It is also worth thinking carefully about how each subject is taught and assessed, because the way marks are earned varies significantly between courses. Some subjects are almost entirely exam-based, while others require sustained portfolio work, creative projects, or practical performances across the whole year. Knowing your own strengths as a student before you commit to a subject can save you a lot of frustration. Ask yourself:
- Do I perform well under exam pressure, or do I tend to do better when assessed through assignments and projects over time?
- Am I comfortable building and presenting a portfolio of work across an entire year, as subjects like Visual Arts and Design and Technology require?
- Do I enjoy performance-based assessment, such as the practical components in Music, Drama, or PDHPE?
- Can I manage the sustained independent commitment that subjects like English Extension 2 (major work) or History Extension demand?
- Do I work well with open-ended, research-driven tasks, or do I prefer structured problems with clear right and wrong answers?
- Am I comfortable with subjects that require a lot of writing under time pressure, such as Modern History, Legal Studies, or Economics?
- Do I enjoy lab work and the practical components of science subjects, or do I find them stressful and time-consuming?
- How do I handle subjects where success depends heavily on memorisation versus those that reward understanding and application?
There are no right or wrong answers to these questions, they are simply tools to help you make a choice you can commit to and perform well in across two full years of study.
Step 3: Understand Scaling, But Don't Be Ruled By It
Scaling exists to make the ATAR fair across subjects of varying difficulty. Subjects that attract high-performing students and are objectively harder tend to scale up; subjects with broader participation and lower average difficulty tend to scale down.
Subjects that historically scale well include:
- Mathematics Extension 1 and Extension 2
- Chemistry and Physics
- Economics
- Latin
Subjects that tend to scale more modestly include:
- English Standard
- Mathematics Standard
- Visual Arts and Drama
This does not mean you should avoid the latter group. If you are genuinely strong in Visual Arts and passionate about it, a high mark in that subject will contribute solidly to your ATAR. What it does mean is that if you are choosing between two subjects you are equally interested in and equally capable of, and one scales significantly better, that is a reasonable tiebreaker.
For a detailed breakdown of how scaling works and which subjects were scaled in recent years, see our HSC Scaling Report 2024 and our guide on How Does the HSC Work?
Step 4: Think About Your English Course Carefully
English is compulsory, which makes choosing the right English course one of the most consequential decisions in your subject selection. The main options are:
- English Standard: suitable for students who find English challenging; scales modestly
- English Advanced: the most popular choice for students targeting competitive ATARs; scales better than Standard
- English Extension 1: an additional 1-unit course on top of Advanced, for strong writers who enjoy literary analysis and theory
- English Extension 2: Year 12 only; requires Extension 1; involves producing a major work
Most students aiming for an ATAR above 85 are advised to at least attempt English Advanced. For a full breakdown of each English course, see our guides on HSC English Standard, HSC English Advanced, and HSC English Extension 1.
Step 5: Think About Your Maths Course
Maths is not compulsory in the HSC, though it is very commonly studied, and for good reason. The right level of Maths can significantly boost your ATAR through scaling, and it is a prerequisite or assumed knowledge for many university degrees.
The four main Maths courses are:
- Mathematics Standard: two levels (Standard 1 and Standard 2); suitable for students who need Maths but find it difficult; scales modestly
- Mathematics Advanced: the core calculus-based course; required for most STEM and commerce degrees
- Mathematics Extension 1: 1 additional unit on top of Advanced; strong scaling; for students who excel at Maths
- Mathematics Extension 2: Year 12 only; 1 additional unit on top of Extension 1; the most demanding Maths course in the HSC; excellent scaling
For a full comparison, see our dedicated guide on HSC Maths courses, as well as our deep-dives into HSC Maths Standard, HSC Maths Advanced, HSC Maths Extension 1, and HSC Maths Extension 2.
Common Subject Selection Mistakes to Avoid
Choosing subjects based on what your friends are doing. Your friends have different strengths, interests, and university goals. Your subject selection should be built around you.
Dropping Maths too early. Many students who find Maths difficult in Year 10 drop it entirely, only to discover later that their target university degree requires it. At minimum, consider Maths Standard as a pathway that keeps doors open.
Overloading on extension courses. Extension courses are valuable, but only if you can perform well in them. Taking four extension units across English and Maths simultaneously is ambitious — make sure you have the capacity.
Ignoring the VET pathway. Vocational Education and Training courses can count toward your ATAR and earn you an industry qualification simultaneously. If you have a clear vocational goal, this can be a smart and efficient choice.
Leaving subject changes too late. You can swap or discontinue subjects up until the beginning of Year 12. If something is not working in Year 11, act early rather than hoping it improves.
How a Tutor Can Help With Subject Selection
Choosing subjects is not something you need to do alone. At Apex Tuition Australia, our tutors have sat the HSC themselves and achieved outstanding results, they understand the real-world implications of subject choice on ATAR outcomes. Getting expert advice early can save you from costly decisions that are difficult to reverse.
Once you have selected your subjects, our HSC tutors can help you build the skills, confidence, and exam technique to maximise your results in every course you choose.
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