After trying to wrest a gun and deflecting the bullet trajectory away from her classroom of kids, a kindergarten teacher in Virginia was shot in the chest and nearly killed two weeks ago. Her first words to emergency responders: "Do you know how my students are? Are the kids OK?"
Such is the character-defining instinct of natural-born teachers. It requires no forethought and, contrary to what some demagogues believe, it is not canceled by union membership.