I disagree. the guns carried by teachers should be their own and ones with which they are familiar and practiced and which are on their person for immediate use in an emergency.
The first seconds are very important. If the shooter is opposed, immediately his plans change.
Put signs out front of the school that “Employees are armed. CCW license holders are welcome to carry.
That will keep the creeps out of your school.
Problem i see is the majority of teachers are liberal and won’t even touch a gun.