I am all for arming teachers. ALL OF THEM! Just like they do in Israel. The colorado shooter went to three other theators first and when he did not see a gun busters sign, he moved on fearing a CHL holder. The fourth theator had the desried "gun free zone" sign and he shot people up.
Once it is firmly known that all teachers and administrators are armed and trained schools are no longer a hunting ground.
The article about talks about "smart gun" technology that would keep a weapon safe if a student got their hands on it.
This is as logical a solution as I've heard yet.
You never see a mass shooting at a police station for a reason.
As soon as you make an area "gun free", even an Army base like Ft Hood, nut jobs see targets.