Not sure I agree with immature students being armed, but school authorities being trained and armed - yes.
It makes no sense to allow college students, most of whom do not qualify as adults, despite what the law has decided, to carry guns into a school.
And why should we trust school authorities with weapons? Most of them are liberal and probably support gun control, as in, the average citizen should not have one. More to the point, that profession is no more exempt from outrageous behavior than any other.
Civil society has been in a meltdown for the last 40+ years and we're living with the horrific results in all areas.