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Aggression in children can present problems for parents, caregivers, teachers and school administrators. Understanding the different types of aggression may help you to come up with a strategy for dealing with a child's aggressive behavior. Aggression can be manifested in different ways ranging from teasing and bullying to the more horrific manifestations such as high school shootings. According to Henri Parens, a psychiatry professor at Jefferson Medical College, childhood aggression comes in four types.