OC Test vs Selective Test: What Is the Difference?

Parents use "the selective test" to mean two different things, and the department's own names do not help: one is the Opportunity Class Placement Test and the other is the Selective High School Placement Test. They are separate tests, sat two years apart, with separate applications and separate outcomes. Getting a place through one has no bearing on the other. Here is how they compare, and what that means if you have a child in Year 3 or Year 5 right now.

Side by side

Where they are the same

Both tests are run by the NSW Department of Education and applied for through the same online dashboard, not through the school. Both are done on a computer, on one allocated day, at a department test centre, and in both the Reading section has questions that ask for more than one response. Neither allows calculators, rulers or dictionaries, and both provide paper for working out. Neither has a pass mark: each produces a placement score, and each school on the family's list comes back as an offer, a reserve-list place or unsuccessful. Since 2026 both are sat only in NSW, and for both the family has to be living in NSW by the start of the school year of entry.

Because Reading, Mathematical Reasoning and Thinking Skills appear in both, the skills underneath are the same. Reading accurately across different kinds of text. Solving problems in more than one step without a calculator. Reasoning under a clock. A child who prepared properly for the OC test is two years ahead on the selective test, whether or not they got an OC place.

The big difference is Writing

The selective test adds a 30-minute Writing task worth a quarter of the score, marked against criteria such as ideas, structure, language and expression. The OC test is multiple choice from start to finish. For a Year 6 child, Writing is the section most often left until last, because it cannot be practised with an answer key. For a Year 4 child it does not exist, which is why OC preparation can be spent entirely on reading, number and reasoning.

The other difference is size. The selective sections are longer: 17 Reading questions carrying 38 responses, 35 maths questions, 40 Thinking Skills questions, and a day close to four hours. The OC test is shorter, but the children are younger, and 45 to 80 seconds a question feels tight to a nine year old.

Does an OC place lead to a selective school?

No. An opportunity class is a Year 5 and 6 class inside a primary school. When that child reaches Year 6 and wants a selective high school, they apply for and sit the selective test like everyone else. The OC place does not carry over, and there is no reserved path from one to the other. The reverse is also true: a child who missed an OC place in Year 4 is at no disadvantage in the Year 6 application. The two outcomes are independent.

Can a child sit both?

Yes, two years apart. The OC test is sat once, in Year 4, with no second attempt in Year 5. The selective test is sat in Year 6. Plenty of families plan for both, and the work done for the first carries into the second.

Which one is in front of you

If your child is in Year 3 now, it is the 2027 OC test, and applications open on 5 November 2026. Six to nine months of preparation is typical: daily reading, times tables and reasoning puzzles first, then practice on a computer, then timed mock tests in the last four to six weeks. The NSW OC Test guide has the format and the dates.

If your child is in Year 5 now, it is the 2027 selective test, with the same application window. Nine to twelve months is the usual run, and Writing needs a plan of its own. The NSW Selective School Test guide covers it.

If you have both ahead of you over the next three years, treat the OC preparation as the foundation and add Writing in Year 5.

For either test, the free calculator on our readiness check page turns practice marks into an estimate of which schools are within reach, and the schools directory lists the opportunity class schools and the selective high schools side by side, with the published entry history for each.