This article describes the effects of a social skills training on prosocial behavior, self concept, and peers acceptance, in three children: P. 1, female, 9 years old, aggressive behavior and difficulty of learning; P. 2, male, 7 years old, aggressive behavior; P. 3, male, 13 years old, extremely shy, difficulty in learning, The program was cognitive behavioral based and was conducted in group, in 20 sessions. The evaluation of the results done through children, peers and parents' reports showed an increase in prosocial behavior and positive changes in self concept and peers judgment. Future programs to children with learning difficulties should expand the social skills training to the school environment.