The argument that there are some responsible gun owners is not persuasive. We are talking about weapons that can cause serious bodily injury and death, and on top of that we are talking about schools with children. We cannot rely on a select few in a certain situations to maybe save a life. Ban guns from schools all together and no one needs to be worried about their life. Furthermore research shows that even a responsible gun owner is unable to use the gun properly in a moment of crisis.