The paper identifies aspects of subtle social aggression in the school environment that can make children and staff feel quite miserable and unsafe, and which will thus likely impair a child's capacity to learn, and a teacher's capacity to teach. Unaddressed power dynamics created by the interaction and attitudes of those in the social context are defined, and the interpersonal dynamics of the abdicating bystander described. A randomized controlled trial of an intervention for elementary schools is described briefly, which attempts to modify social aggression.