Ключевые слова: aggression, aim, armed, background, backpack, children, concept, copybook, criminal, danger, education, firearm, flat, free, gun, kid, kill, law, lay, learn, lesson, life, murder, object, pistol, prevention, problem, protection, protests, punishment, pupil, risk, safety, school, security, shooting, social, stationery, stop, study, table, terrorism, threatening, top, underage, victims, view, violence, weapon, wooden,