I think a full time cop at a school in full fluro and a gun is not a good idea, but someone whose technically a police officer (went through the academy etc) but has a support role (eg;counselor, psychologist, community liaison) would be OK. Keep in mind there thousands of cops who work in support roles and are not on the front lines with a gun every day (but went to the academy and are trained to) . Im pretty sure that's what they're planning, because an actual cop at school patrolling would be really dumb. I know so many kids from year 7 and 8 who wouldve been jailed and had their whole life fucked up if this was a thing back then, for getting caught with a machete or jumping someone etc. and most of them grew out of that phase. But to be fair there were alot of situations that the teachers shouldn'tve had to handle and were definitely better suited for police to break up.
But I think a cop there as a counsellor or something most of the time (but also able and trained to handle bad situations) would be good. I think it's better to have someone whose a cop break up a fight when you have eight testosterone fuelled 15 year olds trying to beat the fk out of someone, rather than leave the job to your 60 year old geography teacher. I also assume the police mandate at these schools will be much more of a pastoral role and to help placate dangerous situations to be sorted out by the school later once things are resolved. They won't be arresting people for little things every day, but will try to keep order and break things up so that things can be sorted with the students long term welfare in mind. At least that's what my expectation is. It probably isn't worth the resources though and opportunity cost of deploying someone at the school instead of somewhere else.