Everyone has different opinion, which I will respect, but here is the thing:
As you may know Donald Trump wants to arm teachers with weapons to prevent attacks (like the one in Florida few days ago).
My opinion:
This could be bad, but when teacher is not physically alright (for ex. is being bullied by students) which happens alot in my country, one teacher even suicided due to this, and I dont think it could be good cause the teacher would just shoot on that student no matter what will happen in future so if the teacher cant stand it anymore he/she can just shoot whole class and thensuicide, being teacher is sure not easy. Please note that this fact just comes because of school state in my country (Czech Republic) I am not really sure how it works in USA.