Should Teachers carry guns in class?

Here is a teacher who is taking a class to be able to carry a gun at school.  As a teacher, this scares the crap out of me.  If I happened to shoot a child or parent while trying to take out a 'bad guy' would be terrible and very difficult to live with.

why do we have clips of more then 10 bullets where a deranged person can shoot 30 plus shots in 25 seconds?  Big Clips and semi-auto assault weapons are meant to kill, they should be for police and military only.

http://crooksandliars.com/karoli/ed-schultz-interviews-utah-teacher-who-want