I have no idea how it works in the other states Arte because the education systems are different. In NSW they do two years of preschool none which is not compulsory (but in the best interests of the child to send them). We only sent L for the year before he started school but the girls did the 2 years. And then once they are 5, or just about to turn 5 they start Kindergarten which is 'big school' and that is fulltime. If you had your child in fulltime childcare because you work then they would do a full 5 days a week of preschool by default as childcare does a preschool program. In all the other states their equivalent of Kindergarten is Prep and preschool is kinder.