Sorry, but you already have a building FULL of ‘employees’. Get the GOVT out of the way and stop ‘em from infringing upon their/our Rights.
If the teachers/admins/etc. wish to carry, as every OTHER Citizen has the inalienable Right to do, let them.
There’s no need for paid officers, ex-military, ‘volunteers’...
Just more ‘solutions looking for problems’ a la unconstitutional, intruding, interfering, infringing *GOVT*.