i think teachers should have their own like, independent carry license where they have to do go through extra vetting process and a somewhat advanced certificate of training in order to carry on school grounds. One, to make sure they are mentally fit enough to be carrying a firearm around school of 2000 children, and two, to make sure they have a greater understanding of gun safety (they'd already be required to have this in order to own a firearm, but maybe a more extensive one)