OC and Selective: different tests, different year levels
Both Opportunity Class (OC) and Selective High School pathways use placement tests administered by the NSW Department of Education. They are independent of each other and have different entry points, test structures and timing. Understanding which test applies to your child — and when — is the starting point.
OC Placement Test
Selective HS Placement Test
The OC Placement Test: components explained
The OC Placement Test has three scored sections. From 2025, the test is delivered computer-based. All questions are multiple-choice and there is no negative marking — students are not penalised for wrong answers, so attempting every question is always the right strategy.
Reading
Students read a range of texts and answer comprehension questions. Reading accounts for roughly one third of OC test marks. A Cloze Passage (fill-in-the-blank / select-the-word) question type was added to the Reading section in 2025.
Slowest domain to improve. Start early.
Mathematical Reasoning
Covers number, measurement, data and spatial reasoning. Questions require applying mathematical knowledge to novel problems — not just computation. Responds well to consistent practice over several months.
Thinking Skills
Verbal and non-verbal reasoning — pattern recognition, abstract sequences, logical deduction, spatial puzzles. Not taught in the regular school curriculum, so most children are unfamiliar with these question types until they encounter them in preparation.
Highest gain from targeted practice. Prioritise this.
The Selective Placement Test: components explained
The Selective High School Placement Test includes the same three core components as the OC test — Reading, Mathematical Reasoning and Thinking Skills — plus a Writing component not present in the OC test. The difficulty level is significantly higher, reflecting that students are two years older and the competition is more intense.
Reading
More complex texts than OC, including analytical reading of longer passages, inference and critical understanding. Vocabulary breadth and reading stamina matter more at Year 6 level.
Mathematical Reasoning
More advanced content aligned to the upper primary curriculum, including multi-step problems and a wider range of mathematical topics. Speed and accuracy under timed conditions are important.
Thinking Skills
More abstract and demanding than in the OC test. Students who have practised these question types — including through OC preparation — are generally better placed for this component.
Writing
A written response to a stimulus prompt — either narrative or persuasive. Scored on ideas, structure, vocabulary, grammar and cohesion. Not present in the OC test. Requires dedicated timed writing practice.
How school assessment feeds into your score
For both OC and Selective placements, the NSW DoE does not rely solely on the placement test score. A school assessment score — provided directly by your child's current school — is incorporated into the overall placement score.
How the overall placement score is calculated
The final placement score used to determine offers is a combination of:
- Placement test performance — your child's result across the test components described above
- School assessment — data provided by the child's current school to the NSW DoE
The NSW DoE publishes the exact weighting of each component each application year. The weighting has changed over time. Always check the current year's published weighting on the official NSW DoE placement pages before making assumptions based on previous years' information.
Parents do not need to submit the school assessment separately — the DoE coordinates this directly with schools after the application window closes. You do not see the school assessment score; it is handled between the school and the DoE.
Minimum entry scores: what they are and where to find them
There is no single fixed score that guarantees entry into an OC or Selective High School. Minimum entry scores (often called "cut-off scores") depend on:
- The number of available places at each school in that year
- The total number of applicants
- The overall performance of the applicant cohort (how competitive the field is in any given year)
- The preferences listed by applicants — more competitive schools receive more high-scoring applicants
This means a score that was sufficient for a particular school in a previous year may not be sufficient in a more or less competitive year. Cut-off scores can shift up or down from one year to the next without any change in the test itself.
Where to find current official cut-off information
The NSW Department of Education is the only authoritative source for current minimum entry scores and placement information. Do not rely on scores shared in parent Facebook groups, tutoring centre websites, or third-party publications — these may be inaccurate, outdated, or specific to a previous year's cohort.
Use these official pages:
How to prepare effectively, given how scores work
Understanding the scoring system leads directly to smarter preparation decisions. Here is what it means in practice:
Start with Thinking Skills
Thinking Skills is not taught in the regular school curriculum, meaning most children encounter it for the first time when they begin OC or Selective preparation. It responds well to targeted practice — children who are exposed to these question types early become significantly more comfortable with them. Given its presence in both the OC and Selective tests, it deserves priority in any preparation plan.
Don't neglect Reading
Reading makes up roughly one third of OC test marks, and it is the slowest domain to improve significantly in the short term. Building reading comprehension requires consistent wide reading over time. This means preparation for Reading should start early — well before the last few months before the OC test. Regular reading at home throughout Years 3 and 4 is the most effective preparation.
For Selective, add writing practice early
If your child is aiming for Selective High School entry, the Writing component requires separate, dedicated practice. Timed written responses to varied prompts — both narrative and persuasive — build the speed, structure and vocabulary that assessors reward. Starting in Year 5 gives time to develop these skills properly.
Consistent short sessions beat cramming
Research on exam preparation is consistent: regular short sessions (15–20 minutes per day) over a period of months outperform intensive last-minute preparation. This aligns with how Cleveroo is designed — daily adaptive practice that builds habits and tracks progress across all three (or four) test components.