How Many Units Should You Take in Year 11?

You have six subjects on your Year 11 course selection form, and someone suggests adding a seventh. Their argument is that more units give you more opportunities to improve your ATAR. It sounds reasonable, but is it actually worth the extra work?

In NSW, you need at least 12 units of Preliminary courses in Year 11 to meet the standard HSC pattern of study requirements. For most students, 12 units is a sensible starting point. Taking 13 or 14 units can also be worthwhile, but only when the extra course serves a clear purpose and you can manage the workload.

You do not need to take 14 units to achieve a strong HSC or ATAR. The important thing is choosing a combination of subjects that meets the requirements, suits your abilities, and leaves you enough time to perform well.

Policy and admission information in this guide has been checked against official sources as at 8 November 2026.

01How many units do you actually need in Year 11?

The NSW Education Standards Authority (NESA) sets minimum requirements for the number of units you must complete across Years 11 and 12.

For a standard two-year HSC pathway, the requirements are:

These are two separate requirements. You cannot start Year 11 with only 10 units because you intend to study 12 in Year 12.

A unit is a measure of the credit value of an HSC course. Most standard courses are worth 2 units, so six standard courses will usually give you the 12 units required in Year 11.

However, some courses, particularly extension courses, have different unit values.

The other NESA requirements

Reaching 12 units is not enough on its own. Your Preliminary and HSC patterns of study must also satisfy several other requirements.

Both patterns must include:

• 2 units of a Board Developed English course.
• At least 4 additional units of Board Developed courses.
• At least 3 courses worth 2 units or more. These can be Board Developed or Board Endorsed courses.
• At least 4 subjects.

There are also limits on science courses:

• You can study a maximum of 6 units of Preliminary Science courses in Year 11.
• You can study a maximum of 7 units of HSC Science courses in Year 12.

Course exclusions and other eligibility conditions also apply.

These requirements are set out in NESA’s official Pattern of Study rule.

One important distinction: NESA requires a minimum of 12 units in Year 11, but only 10 units in Year 12. There is no universal NESA requirement that every student must maintain 12 units throughout both years.

Your school may have additional expectations, which we’ll look at shortly.

02What does a 12-unit or 14-unit pattern look like?

Let’s turn those numbers into actual subject combinations.

Assuming you choose standard 2-unit courses, here are some examples of eligible patterns.

These examples assume the courses are Board Developed, belong to separate subject areas, and have no applicable course exclusions.

Notice that the first Year 11 combination has six subjects and the second has seven.

Both satisfy the minimum Preliminary unit requirement. The second pattern also reaches the maximum permitted 6 Preliminary Science units through Physics, Chemistry, and Biology.

03Does taking more units improve your ATAR?

This is probably the biggest misconception surrounding Year 11 subject selection.

You might think that taking 14 units instead of 12 gives you more opportunities to accumulate high marks. There is some logic behind that idea, but the ATAR calculation is more specific.

In NSW, UAC calculates your ATAR using an aggregate of scaled marks from 10 units of HSC courses:

• Your best 2 units of English.
• Your best 8 units from your remaining courses.

This means that if you complete more than 10 eligible units, UAC can select the best-performing combination of units for the aggregate.

For example, imagine you complete 12 eligible units:

• 2 units of English.
• 10 units across your other courses.

Your ATAR aggregate uses the 2 English units and the best 8 of the remaining 10 units.

The other 2 units do not automatically contribute.

More units can provide flexibility, not a guaranteed advantage

Extra courses can be useful because they give you more eligible units to choose from when UAC calculates your aggregate.

But there is a trade-off.

Suppose adding another course means you have less time to practise Mathematics, revise Physics, or prepare for an English assessment. If your results suffer across several subjects, the additional course may have done more harm than good.

You also need to remember that scaling is not a fixed bonus attached to a subject.

UAC scales courses to allow marks from different subjects to be compared fairly. Your scaled mark is influenced by your position in the course and the course’s scaled mean.

A course that has historically scaled strongly does not guarantee that you will receive a higher scaled mark. You still need to perform well.

UAC explicitly advises students to choose courses based on their interests, abilities, and future plans rather than supposed scaling advantages.

You can read the official explanations here:

• UAC: How your ATAR is calculated
• UAC: FAQs about the ATAR

04HSC eligibility and ATAR eligibility are different

There is another detail worth understanding before choosing your subjects.

Meeting NESA’s HSC requirements does not necessarily mean you qualify for an ATAR.

To be eligible for an ATAR in NSW, UAC requires you to satisfactorily complete:

• At least 10 units of HSC Board Developed courses.
• 2 units of English.
• At least three Board Developed courses worth 2 units or more.
• At least four subject areas.

This is slightly different from the general NESA requirements for receiving the HSC.

For example, imagine a student completes the following 10-unit HSC pattern:

Assuming the other NESA requirements are satisfied, this student can meet the HSC pattern of study requirements.

However, only 8 of the 10 units are Board Developed courses.

The student therefore does not meet UAC’s 10-unit Board Developed requirement for ATAR eligibility.

This is why you should check both sets of requirements when selecting courses. If you intend to pursue an ATAR, make sure your HSC pattern contains enough eligible Board Developed units.

For the complete rules, see UAC’s ATAR eligibility requirements.

05Don’t confuse courses with subject areas

This is particularly important if you’re considering extension subjects.

A course is a specific qualification or level of study. A subject area is the broader discipline to which that course belongs.

For example:

Notice that three English courses still count as one subject area.

Likewise, studying several Mathematics courses does not give you several different subject areas.

UAC gives an example of a student studying English Advanced, English Extension 1 and 2, Mathematics Extension 1 and 2, and one other 2-unit course.

Despite having several different course names, this student has only three subject areas: English, Mathematics, and the other subject.

They do not satisfy the four-subject-area requirement for an ATAR.

You need breadth across at least four distinct subject areas, not simply a large number of course names.

A note about Mathematics Extension 1 and 2

Mathematics Extension courses also have special unit-weighting rules.

For ATAR calculations:

• Mathematics Advanced contributes 2 units.
• Mathematics Extension 1 contributes 1 unit when studied with Mathematics Advanced.
• When Mathematics Extension 2 is studied, Mathematics Extension 1 accounts for 2 units in the ATAR calculation.
• If you satisfactorily complete Mathematics Advanced, Extension 1, and Extension 2, your Mathematics Advanced result will not be included in the ATAR calculation.

These rules are explained in UAC’s Mathematics extension course information.

Don’t simply count the number of Mathematics course names when calculating your total units or estimating your ATAR contribution.

06University prerequisites: Do you need particular subjects?

Your potential university course should influence your subject selection, but it is important to distinguish university requirements from NESA requirements.

NESA does not require every NSW student to study Mathematics Advanced, Physics, or Chemistry.

Individual universities can, however, set requirements for particular degrees.

There are three terms worth understanding.

These terms are not interchangeable.

For example, the University of Sydney currently lists a Mathematics prerequisite for several degrees, including its Engineering Honours courses.

For NSW HSC applicants, the published requirement is:

• Band 4 in Mathematics Advanced, or
• Band E3 in Mathematics Extension 1 or Mathematics Extension 2.

Mathematics Standard does not satisfy this particular prerequisite.

This is a University of Sydney admission requirement for its listed courses. It is not a statewide requirement for all HSC students.

See the University of Sydney’s official Mathematics prerequisite information.

UNSW provides a useful contrast.

Its 2027 Domestic Undergraduate Student Guide lists Mathematics Extension 1 and Physics as assumed knowledge for its Bachelor of Engineering (Honours).

However, UNSW explains that assumed knowledge is not a formal subject prerequisite. Students can still be considered for admission without having studied those subjects, although they may find first-year study more challenging.

See the UNSW 2027 undergraduate guide and UNSW’s explanation of assumed knowledge.

Which admission year should you check?

University requirements change, so the year of entry matters.

For a student in Year 10 during 2026, the usual pathway is:

• Year 11: 2027.
• Year 12: 2028.
• University entry: 2029.

The UNSW guide linked above is for 2027 university entry. It is a useful current example of assumed knowledge, but it does not establish the requirements for a student applying for 2029 entry.

Similarly, UAC’s 2026 Year 10 course selection booklet lists university courses offered in 2026. Its general course-selection advice is useful, but its institution-specific listings should not be treated as guaranteed 2029 admission requirements.

When your application year approaches, check the actual course page and the relevant UAC course listing.

The key point is simple: a university prerequisite might influence your HSC subject selection, but it does not change the number of units NESA requires you to study.

07How should you decide between 12 and 14 units?

Now that the rules are clear, the decision becomes more practical.

You need to consider what you want to study, how well you can manage the subjects, and what else occupies your week.

When 12 units is the better choice

A 12-unit pattern is a sensible option if:

• You have six subjects that genuinely interest you.
• You want enough time to understand the material rather than rush through it.
• You have substantial extracurricular commitments.
• You work part-time or have responsibilities outside school.
• You would rather concentrate on a smaller number of subjects and aim for consistent results.

Remember that 12 units already meets the Preliminary minimum.

You are not academically disadvantaged simply because another student has chosen 14 units.

When 13 or 14 units might make sense

A larger pattern can be useful if:

• You are genuinely interested in another subject.
• You want to explore a subject before deciding whether to continue it into Year 12.
• You have a particular university course in mind and the additional subject provides useful preparation.
• Your school offers a suitable timetable and you can manage the additional assessments.
• You want the flexibility to discontinue a course later without falling below the 10-unit HSC minimum.

The important word here is genuinely.

Adding another course because you enjoy the subject is a reasonable decision. Adding it because you heard that a particular subject scales well is not.

Units don’t tell the whole workload story

Two students can both study 12 units and have very different workloads.

Consider the nature of their courses.

A student taking Mathematics Advanced, Mathematics Extension 1, Physics, Chemistry, and English may spend considerable time practising difficult problems, completing practical work, and revising technical content.

Another student with 12 units may have more essays, performances, research projects, or major creative tasks.

Neither pattern is automatically easier.

You also need to account for:

• Sport and extracurricular activities.
• Part-time employment.
• Travel time.
• Family responsibilities.
• Assessment deadlines that occur in the same week.
• The time you need for sleep, exercise, and recovery.

Look at your school’s actual assessment calendar if possible. A timetable that looks manageable during a normal week might become difficult when three major assessments fall together.

Your course load also competes with your social life and relationships. If those commitments are part of your decision, tutorgum’s Should You Date During the HSC? A Practical Guide explores that separate part of managing your time.

Your school may have its own rules

NESA sets the minimum requirements for the HSC, but individual schools have some discretion over their subject offerings and enrolment arrangements.

For example, your school might:

• Require students to maintain 12 units throughout Year 12.
• Limit the number of subjects students can take because of timetable constraints.
• Require approval before students add or drop a course.
• Have specific progression requirements for extension subjects.
• Restrict certain combinations because of course exclusions.

If your school tells you that you must take 12 units in Year 12, ask whether this is a school policy or a NESA requirement.

The two are not the same.

Before dropping a subject at the end of Year 11, also check that your remaining pattern meets the HSC and ATAR requirements and does not remove a university prerequisite you might need.

08One more consideration: New Physics and Chemistry syllabuses

If you’re choosing science subjects for Year 11 in 2027, there is a syllabus change worth knowing about.

NESA has introduced replacement 2025 syllabuses, but Physics and Chemistry have different implementation years.

This means a student beginning Year 11 in 2027 will study the new Physics syllabus but the existing 2017 Chemistry syllabus.

The new Physics course replaces the 2017 course from 2027. The new Chemistry course replaces its 2017 equivalent from 2028.

This matters when comparing study guides and course resources. References to Module 1-8 belong to the 2017 science syllabuses, not the replacement 2025 courses.

You can check the official course structures here:

• NESA Physics 11-12 Syllabus (2025)
• NESA Chemistry 11-12 Syllabus (2025)

The syllabus changes do not alter the basic number of units you need. They do affect which course content and study materials are relevant to your cohort.

09Questions and solutions

Use these scenarios to check whether you can apply the rules rather than simply remember the numbers.

Question 1

A student chooses six Preliminary courses in Year 11. Each course is worth 2 units.

How many units does the student have, and does this satisfy NESA’s minimum Preliminary requirement?

Solution 1

Yes. The student has exactly 12 units, which satisfies NESA’s minimum Preliminary requirement.

Calculate the total:

\[ 6 \times 2 = 12 \text{ units} \]

The student meets the unit requirement, although the other conditions must still be satisfied.

The important distinction is that six courses are not automatically sufficient just because there are six of them. Their unit values and subject areas also matter.

Question 2

A student proposes the following Preliminary pattern:

• English Advanced (2 units)
• Mathematics Advanced (2 units)
• Physics (2 units)
• Chemistry (2 units)
• Biology (2 units)
• Earth and Environmental Science (2 units)
• Economics (2 units)
• Visual Arts (2 units)

The student argues that the 16-unit pattern is allowed because it includes more than the required 12 units.

Is the pattern eligible under NESA’s Preliminary science restriction? Explain precisely what needs to change.

Solution 2

No. The pattern exceeds NESA’s maximum of 6 Preliminary Science units.

The four science courses contribute:

\[ 2+2+2+2=8 \text{ Science units} \]

NESA permits a maximum of 6 Preliminary Science units.

The tempting argument is that 16 total units should be acceptable because it exceeds the 12-unit minimum. However, the minimum total and the maximum science allowance are separate rules.

The problem is not simply that the student has too many units overall. It is that 8 of those units come from Science.

To fix the pattern, the student could remove one 2-unit science course or replace it with a suitable non-science course.

That would reduce the Science component to 6 units while maintaining the overall course load.

Whether the school can accommodate the revised timetable is a separate consideration.

Question 3

A student has the following HSC pattern:

The student has satisfactorily completed all courses.

Can the student meet NESA’s HSC pattern requirements? Are they eligible for an ATAR?

Solution 3

The student can meet the NESA HSC pattern requirements, but they are not eligible for an ATAR through this pattern.

First, check the HSC requirements:

• 2 units of Board Developed English: satisfied.
• At least 4 additional Board Developed units: satisfied, with 6 additional units.
• At least 3 courses worth 2 units or more: satisfied.
• At least 4 subjects: satisfied.

The student also has 10 total units.

However, UAC requires at least 10 units of Board Developed HSC courses for ATAR eligibility.

This student has only:

\[ 2+2+2+2=8 \text{ Board Developed units} \]

The additional 2 units come from a Board Endorsed course.

That course can contribute to the HSC credential, but it cannot make up the missing Board Developed units required for an ATAR.

The distinction is between completing the HSC and qualifying for an ATAR. They are related, but they are not identical.

Question 4

A student completes the following courses:

• English Advanced.
• English Extension 1.
• English Extension 2.
• Mathematics Extension 1.
• Mathematics Extension 2.
• Biology.

They believe they have satisfied the four-subject-area requirement because they have studied six different courses.

Explain why this reasoning is incorrect and what kind of additional course would address the problem.

Solution 4

The student has only three subject areas: English, Mathematics, and Biology.

The number of course names does not determine the number of subject areas.

All three English courses belong to English. Both Mathematics Extension courses belong to Mathematics. Biology contributes one additional subject area.

Therefore:

\[ 1+1+1=3 \text{ subject areas} \]

The student needs a course from a fourth distinct subject area, such as Economics, Modern History, or Visual Arts.

Adding another English or Mathematics extension course would not solve the problem.

This is a particularly important distinction for students taking several extension courses. A pattern can contain enough units and multiple course names but still fail the subject-area requirement.

Question 5

Leah is in Year 10 in 2026 and will begin Year 11 in 2027. She is interested in studying engineering at university in 2029.

Her proposed Preliminary pattern contains:

She performs strongly in Mathematics Advanced but has substantial commitments outside school.

A friend tells her that she must add Mathematics Extension 1 because all engineering degrees require it.

Leah can take the additional course, but it will increase her workload.

Using the university information available as at 8 November 2026, assess whether her friend’s advice is correct. Should Leah add Extension 1 purely to keep engineering open?

Solution 5

No. Her friend’s statement is too broad, and Leah should not add Mathematics Extension 1 solely because she believes every engineering degree requires it.

There are two important differences between the published university requirements.

First, consider the University of Sydney.

Its current mathematics prerequisite for listed Engineering Honours courses can be satisfied by:

• Band 4 in Mathematics Advanced, or
• Band E3 in Mathematics Extension 1 or 2.

This means Mathematics Advanced can satisfy the published prerequisite without requiring Leah to complete Mathematics Extension 1.

Of course, she would still need to achieve the required result.

Second, consider UNSW.

The 2027 Domestic Undergraduate Student Guide lists Mathematics Extension 1 and Physics as assumed knowledge for its Bachelor of Engineering (Honours).

However, UNSW explicitly distinguishes assumed knowledge from formal prerequisites.

Not studying Extension 1 does not automatically prevent a student from being considered for admission. It may, however, mean that the student needs additional preparation to manage the mathematics in first-year engineering.

Now consider the year Leah will actually apply.

Leah is planning to start university in 2029, not 2027.

The UNSW guide currently available is for 2027 entry, so its requirements cannot be treated as guaranteed conditions for Leah’s admission year. The University of Sydney’s current prerequisite information must also be checked again before she applies.

Finally, consider the workload.

Leah already has a valid 12-unit Preliminary pattern. She is studying Mathematics Advanced and Physics, both relevant to her engineering interests.

Taking Extension 1 could provide valuable mathematical preparation, particularly if she enjoys challenging mathematics and is ready for the additional work.

But it is not automatically the best decision if the extra workload reduces the quality of her performance across her other subjects.

The sensible approach is to investigate the specific engineering degrees she might apply for, distinguish their prerequisites from assumed knowledge, and choose the mathematics level that best balances preparation with her current ability.

The deeper lesson is that university preparation and university admission are different questions. A subject can be extremely useful for succeeding in a degree without being compulsory for entry.

10So, how many units should you take?

For most NSW students, 12 units is a good starting point for Year 11.

It meets NESA’s minimum and allows you to concentrate on six standard 2-unit courses.

Consider 13 or 14 units if an additional subject genuinely interests you, keeps a useful pathway open, or gives you flexibility when choosing your Year 12 pattern.

Before committing, check three things:

1. Your proposed pattern satisfies NESA’s requirements.
2. Your subjects match any relevant university prerequisites or assumed knowledge.
3. You can realistically manage the additional lessons, assessments, and independent study.

Don’t choose extra units simply because someone says they will improve your ATAR.

Once you have settled on the number of units, the next important decision is the level of each subject. In particular, choosing between Mathematics Standard, Advanced, Extension 1, and Extension 2 should reflect your mathematical ability, your future study plans, and the preparation you’ll need for university.