I am all for arming teachers and others carrying on campus. Obviously the gun free zones don't prevent criminals from bringing guns on campus so why should I be banned from the practice. I don't think they should be required to get special training and don't think it should be mandatory. However, I believe it should be advertised that people may be armed at the schools so if you plan to murder someone there you had better think twice. You might be facing one or several gun carriers that you don't know about.