Choosing senior subjects: a parent's guide to keeping options open

The goal of choosing senior subjects is to keep doors open while playing to
your child's strengths, not to chase subjects because they "scale well". In
practice that means covering off any prerequisites for courses they might want,
picking subjects they can do well in and stay motivated by, and treating scaling
as a footnote rather than the plan. A strong result in a subject your child
enjoys beats a mediocre result in one chosen for the wrong reason.

If you take one thing from this page: subject selection is a keep-options-open
exercise, not an optimisation puzzle. You are not trying to find the mathematically
perfect combination. You are trying to avoid closing doors your child might later
want to walk through, while setting them up to do their best work.

Try the "Keep your options open?" quiz below

Just under this introduction you will find our interactive Keep your options
open? subject quiz. It walks through a short set of questions about what your
child is leaning towards and flags where a choice might quietly close off courses
they may want later. Treat its output as a conversation starter, not a verdict,
and pair it with the official prerequisite sources linked throughout this guide.

How do prerequisites actually work?

A prerequisite is a subject a university course requires or assumes your child
has studied in Year 12. Some courses have them, many do not.

The pattern to understand:

• Some degrees require specific subjects. Engineering courses commonly require
  a particular level of maths, and often physics. Some science and health degrees
  assume or require maths and chemistry. Certain courses expect a specific English.
• Many degrees have no subject prerequisites at all. Plenty of business, arts,
  IT, education and social science degrees ask only for a general qualification
  and an entry rank, not particular Year 12 subjects.
• Requirements vary by university and change over time. The same degree name
  at two universities can have different prerequisites, and a course can change its
  requirements between years.

Because of that last point, we deliberately do not list specific prerequisites
here. Instead, check the specific course, at the specific university, for the year
your child will apply:

• Search the course on your state admissions centre (UAC for NSW and the ACT, VTAC
  for Victoria, QTAC for Queensland, SATAC for South Australia and the NT, TISC for
  WA, or the University of Tasmania).
• Check the university's own course page for assumed knowledge and prerequisites.
• Compare courses and their requirements on our university finder.

Why is choosing subjects for scaling a trap?

Scaling is the process the admissions centre uses each year to make marks from
different subjects comparable. The crucial thing families get wrong: scaling
rewards the strength of the group taking a subject, not how "hard" the subject
is, and it is recalculated every single year.

That makes scaling a poor thing to plan around, for three reasons:

• It cannot be predicted. No tutor, teacher or website knows next year's
  scaling. Last year's pattern is a guide, never a promise.
• A modest mark in a heavily scaled subject usually loses. After scaling, a
  strong mark in a subject your child engages with typically beats a weak mark in a
  "well-scaling" subject they dislike.
• Disengagement spreads. A subject your child resents can drag down the time
  and energy they give every other subject.

We unpack the mechanics in our plain-English guide to the
ATAR and how scaling works. The short version for
subject selection: choose for strength and interest, and let scaling be a minor
tie-breaker between two subjects your child would happily take anyway.

How do we balance workload and interest?

The best subject line-up is one your child can sustain for two years, not just
survive on paper. Balance matters more than any single clever pick.

Things worth weighing together:

• Total load, not just each subject. Several very demanding subjects at once
  can be heavier than the sum of their parts. Look at the whole timetable.
• Genuine interest. Motivation carries students through the long middle of Year
  12. A subject they care about gets more, and better, work.
• Track record. Where has your child done well and felt capable? That is real
  evidence, not a guess.
• A mix of types. A blend of essay-based, maths-based and practical or creative
  subjects spreads the assessment style and keeps the load varied.
• Compulsory subjects. Most states require a form of English. Factor that in
  first, then build around it.

What are the common subject-selection mistakes?

Most regret traces back to a handful of avoidable errors:

• Choosing for scaling. Covered above, and the most common trap of all.
• Following friends. Picking a subject because a friend is in the class, rather
  than because it fits your child.
• Copying a sibling or a neighbour's child. Different strengths, different
  interests, different result.
• Prestige over fit. Taking the "impressive" subject your child is likely to
  struggle in, instead of one they can excel in.
• Ignoring prerequisites. Closing off a course they later want because a
  required subject was dropped in Year 11.
• Overloading. Stacking too many heavy subjects and leaving no room to do any
  of them justice.
• Choosing too narrowly, too early. Betting everything on one career idea a
  15 or 16 year old may well change their mind about.

The through-line: nearly every mistake comes from optimising for the wrong thing,
prestige, scaling, or someone else's path, instead of fit and open options.

How do I have the conversation with my teenager?

Aim to be a sounding board, not the decision-maker. The choice lands better,
and sticks better, when your child owns it and you help them think it through.

A few things that help:

• Start with them, not the subjects. Ask what they enjoy, where they feel
  capable, and what they are curious about, before naming any subject.
• Bring facts, not verdicts. Look up real prerequisites and course options
  together rather than asserting what they "should" do.
• Name the keep-options-open principle out loud. Frame it as protecting future
  choices, which lowers the stakes of any single decision.
• Loop in the experts at school. The careers adviser and heads of subject know
  your child and the local rules. Use them.
• Leave room to be wrong. Remind your child (and yourself) that early changes
  are often possible, and that no 16 year old has to have life figured out.

If the wider worry is about results and pathways rather than subjects themselves,
our guides to the ATAR for parents, the
university finder and careers help you see how today's choices
connect to real options later, calmly and without the pressure.

Whatever they choose, the message that matters most is that you trust them to make
a thoughtful decision, and that the door is not as easily closed as either of you
might fear.