Have you checked out the Education website down there, or up here even, to see what sort of things they need to be doing?
The sort of things Nina is doing in preschool now, and next, to prepare her for prep in 2012 are:
recognising & writing letters
recognising & writing numbers
interacting with other children, not just limited to close friends
ability to speak in front of a group

...
mind gone blank, I'll be back with more