You might find preparation by looking at their side of it useful.

This is from our district:



She answers parent questions at the end. Some of the material is district-specific but you will get a good idea of what to expect in terms of responses.

Also keep in mind their perspective. They are dealing with a couple of hundred children, and don't want four and six year olds in the same class. Letting them know that you're aware of these issues (as well as restrictions on child-care limits with younger children, for example) would be helpful.