NSW Opportunity Class (OC) test 2027: a parent's complete guide
If your child is in Year 4 and you're considering an opportunity class, this guide explains exactly what the OC placement test involves, how it differs from the selective test, and how to help your child prepare with confidence.
What is the Opportunity Class (OC) test?
Opportunity classes are for academically high-potential students in Years 5 and 6 at selected NSW public primary schools. Because places are limited, entry is decided by a competitive, computer-based placement test that children sit in Year 4.
The OC test is a natural first step for many families who later consider a selective high school — the skills overlap, so strong OC preparation also builds the foundation for Year 7 entry. If you're weighing the two, see OC vs Selective: which is right for your child?
Who should sit the OC test?
The OC test suits children working comfortably above grade level who enjoy reading and problem-solving. As with any timed test, temperament matters as much as ability — a child who can focus under a countdown and recover from a tricky question will do better than raw ability alone predicts.
The three sections, explained
The OC test covers three areas (there is no writing section). Here's what each looks like, with an original sample.
1. Reading
Comprehension and interpretation across different text types, plus formats like cloze and sentence-gap questions. It rewards careful reading and inference.
Choose the word that best fills the gap: "Despite the storm, the hikers remained ____ and reached the summit."
Answer: determined — the sentence signals persistence.
2. Mathematical Reasoning
Multi-step problems that test reasoning over rote calculation — ratio, rates, and logic applied to numbers, often with diagrams.
A train travels 180 km in 2.5 hours. What is its average speed?
Answer: 72 km/h (180 ÷ 2.5).
3. Thinking Skills
Logic, deduction, patterns and coded reasoning — often the least familiar section, so it's where focused practice makes the biggest difference.
In a code, ROAD is written as SPBE (each letter moves forward one). How is BLUE written?
Answer: CMVF.
See where your Year 4 child stands — free
Take a full-length, timed OC-style practice test. Instant score, band estimate and worked solutions.
Take a free test →How the OC test is scored
Section results are combined into a scaled placement score, and offers are competitive — the score needed depends on demand for each opportunity class. There's no fixed "pass mark"; your child is ranked against other applicants. For parents, the useful measure is where your child's practice score sits as a proficiency band, not the raw number.
Key dates and how to apply
The cycle runs annually: applications open the year before the test, children sit the test in Year 4, and offers follow for Year 5 entry.
How to prepare
- Start with a diagnostic to find the starting point and the gaps.
- Practise in the real digital format — timed, on screen, one section at a time.
- Prioritise Thinking Skills — it's usually the least familiar and most improvable.
- Keep sessions short and regular. Year 4 children learn best in focused bursts.
- Track the band over time, not just individual scores.
Common questions
What year does my child sit the OC test?
In Year 4, for entry into an opportunity class in Year 5.
Is there a writing section in the OC test?
No — the OC test covers reading, mathematical reasoning and thinking skills. Writing appears in the Year 7 selective test.
Should we do OC if we're aiming for a selective high school later?
They're separate, but the skills overlap and OC prep builds a strong foundation. See OC vs Selective.
Is the OC test on computer?
Yes — it's computer-based, so practising on screen helps.