Just close the schools/uni's down for two weeks and send the public servants home, its not that hard.
At least in South Australia, a general closing of all schools is not currently planned because the effect at this phase would actually be to make the rate of transmission worse.
Primary school kids (a group likely to be infected with COVID-19 but not develop symptoms) with working parents largely spend a day off school with their grandparents (a group more likely to be infected and get very sick) which should be avoided. Better to keep them at school, not just for the transmission rate but also for the opportunity for them to be calmly reassured and given accurate information about things.
If the attempt to keep the rate of transmission slow fails and there's a need to shift into a new phase of a complete lockdown, that's when widespread closures would come in.