When I went to school you had preschool when 5 year one when you turned/turning 6 yr 1-7 primary 8-12 highschool.
My DS is 7 & in year one here in Nsw. I had the option to keep him back the yr & do 2 years of preschool 4&5 years old & then kindy/prep when he was 6 & in year one this year. Where as in qld. They have the must be certain age stuff he would of had to have gone into yr 1 last year there & he wasn't ready. That's the main reason I didn't move home.