The home environment is thought to contribute to school violence. The Constitutional Rights Foundation suggests long-term exposure to gun violence, parental alcoholism, domestic violence, physical abuse of the child, and child sexual abuse teaches children that criminal and violent activities are acceptable. Harsh parental discipline is associated with higher levels of aggressiveness in youth. There is some evidence indicating that exposure to television violence and, to a lesser extent, violent video games is related to increased aggressiveness in children, which, in turn, may carry over into school.