Opportunity classes cater for academically gifted students with high potential who may otherwise be without sufficient classmates of their own academic standard. These classes help these students to learn by grouping them with students of similar ability, using specialised teaching methods and materials.
Parents apply when their children are in Year 4. Successful students are offered placement, and if the parents accept the offer, the students attend the opportunity class full time in Years 5 and 6 at the relevant public school. This is a two-year placement program and there is no provision to apply for Year 6 entry only. In the majority of cases, students who accept a place in an opportunity class will leave their current school to attend the school with the opportunity class.
https://education.nsw.gov.au/public-schools/selective-high-schools-and-opportunity-classes/year-5