This is a tough issue all the way around. As a responsible gun owner myself (for family protection, including our livestock, and protection from wildlife) I do keep a close eye on challenges to the 2nd amendment. I agree with Bliss to an extent that some would like to use these school shootings as the basis for an all out ban on the 2nd amendment, that being said survey after survey, and study after study, show that the vast majority of Americans (including gun owners) want common sense gun reform, closing the private sale without documentation loophole, tighter restrictions on bump stocks and other modifications that can make semi auto weapons operate like fully automatic weapons, better screening for mental health issues, or prior violent behavior (spousal abuse ect.).
As far a schools, I agree with those that say there is a BIG difference between a licensed and firearm trained civilian (like the proposed armed teachers) and a fully trained and experienced LEO or military personnel. While arming teachers may have a positive affect of deterring possible mass shooters, it also opens up the possibility of more dangerous accidents like these
http://abcnews.go.com/US/accidental...ed-teacher-resource-officer/story?id=53737703. To me, what makes sense is to have specially trained LEO's or military personnel (vets often have a hard time finding employment after returning from deployment, why not set up a federal program to put them in schools for security services, win/win solution there) placed in schools, with someone with actual combat training/experience, it would be far less likely for accidental shootings to occur and much more likely for a positive result if a deranged shooter did make attempt to shoot up a school.
Of course the main roadblock would be funding such a program, and there would be some outcry that such a plan would be "turning schools into prisons" but to me thats the best solution to a serious problem that just will not go away no matter how much we want it to. There are armed police officers at my kids private school, with a cop car parked very prominently in front of the school at all times, for me that is comforting, not "making the school a prison".