I think we are a long way from arming teachers in public schools in Indiana.
Federal courthouses have set a pretty good example on building security. You are not going to come in and leave through multiple unlocked doors; anyone entering the building is going to be met by armed professionals at the door; anyone entering is going to walk through a metal detector; anyone entering is going to have everything they carry in searched; etc.
Schools with thousands of students are going to need to build the security measures to scale, but it is an issue of money...not an issue of it can't be done.
Federal courthouses have set a pretty good example on building security. You are not going to come in and leave through multiple unlocked doors; anyone entering the building is going to be met by armed professionals at the door; anyone entering is going to walk through a metal detector; anyone entering is going to have everything they carry in searched; etc.
Schools with thousands of students are going to need to build the security measures to scale, but it is an issue of money...not an issue of it can't be done.