thats fine. let the local school boards decide. more reason to vacate blue states.
watch parents move to where the teachers are armed.
As to the question, what if one of the teachers goes bezerk and starts killing kids?
Answer: What is preventing them from doing that now? Has it ever happened? and if it ever does(seems unlikely), there will be someone there to stop them.
You make some good points.
If a teacher does go beserk the other armed teachers will handle the resolution of the issue.