ATAR Scaling Explained: Why Some Subjects Scale Higher Than Others
Introduction
One of the most confusing parts of the ATAR system is scaling. Students often hear advice like "don't take that subject, it scales down" or "do this one, it scales up". But what does scaling actually mean and how much should it influence your subject choices?
Let's break down ATAR scaling in clear, simple terms.
1. What Is ATAR Scaling?
Scaling is the process used by UAC (in NSW) or equivalent authorities in other states to make sure all subjects are fairly compared.
- Because some subjects are harder than others, scaling adjusts marks so that a 90 in one subject means the same as a 90 in another
- If a subject has a very strong cohort, marks tend to scale up
- If a subject has a weaker cohort, marks may scale down
- This ensures no student is disadvantaged for choosing a challenging subject
2. How Scaling Works in Practice
Imagine two students:
- Student A scores 85 in Mathematics Extension 2
- Student B scores 85 in Standard English
Because Extension 2 is attempted by a very strong cohort, the 85 may scale up to something closer to 90+. Standard English, with a wider range of abilities, may not scale as much.
Scaling doesn't change your raw exam mark, but it affects your contribution to your ATAR.
3. Which Subjects Typically Scale Higher?
Subjects that often scale up include:
- Mathematics Extension 1 & 2
- Physics
- Chemistry
- Economics
Subjects that may scale lower include:
- Standard English
- Some humanities or applied subjects
Remember: scaling changes slightly every year, depending on the cohort.
4. Should You Choose a Subject Just for Scaling?
No. Scaling is real, but it's not the only factor. To maximise your ATAR:
- Pick subjects you actually enjoy (you'll work harder and score better)
- Consider your strengths (choose subjects you excel in)
- Factor in scaling, but don't make it the only reason for a subject choice
A high raw mark in a subject you love usually beats a scaled-up mark in a subject you hate.
5. How to Plan Your ATAR Strategy
- Review past scaling reports (UAC publishes them every year)
- Balance your subject selection between interest, ability, and scaling potential
- Track your progress across all subjects, not just one
With Study Marker, you can:
- Generate quizzes from syllabus dot points in any ATAR subject
- Upload essays for instant feedback
- Track strengths and weaknesses across your entire subject load
Final Thought
Scaling is important to understand but it shouldn't control your subject choices. Focus on subjects you enjoy and can excel in. With the right balance of passion and performance, the scaling will work in your favour.
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