Public School Employees carrying concealed in AR

A change in Arkansas law allows certain school employees who are licensed concealed carriers to carry while in the school.  At least one AR school, Clarksville High School,  is using this change in the law. This is probably also happening in a few others states that have changed their laws likewise.  As long as they are licensed, the school has a "plan," and the employees are screened and trained, and local law enforcement is notified, it looks like a good idea. Joint training between the armed employees and local law enforcement would also be a great idea, and perhaps should  be required Anyone have any further info. on other states?