Where I live all of the High Schools have a deputy sherriff assigned to them, and some of the Middle schools do.
They were assigned there to deaL with unruly students and protact the teachers really, but they are there.
Okay, I have no problem with that. What I would say is that this person could be the go to guy, when setting up a concealed carry team for the school campus.
Working in close association with a volunteer force, this guy could keep tabs on things in a manner that would serve the school well.
He could train them, verse them in what methods to use, and how to alert the crew when there is an incident in progress.