Ключевые слова: aim, armed, background, backpack, blackboard, books, bullet, bullets, children, class, concept, copy, crime, criminal, dangerous, defense, desk, education, fire, firearm, gun, handgun, indoors, knowledge, learn, learning, object, pen, police, protect, protection, school, security, shooter, shooting, shot, space, stationery, student, study, studying, supplies, table, target, teacher, text, tools, violence, weapon, wooden,