School Personnel Being Armed

Recent events with school shootings have prompted many reactions.  Some for more guns in schools, some for more security guards, and some for stricter gun/ammo laws.  In Alabama a bill is being placed before the legislature that would give the superintendent of a school system authority to name/appoint certain staff within a school to have a weapon/gun on campus to use in case of a school shooter incident.  How do you feel about this?  What are the pros and cons of this plan?  Do you plan on voicing your opinion to your respective legislator?