In this paper we reflect on a situation that is daily for many teachers who intend to educate their students not only in aspects of scientific type but also in social values, is the fact of having in their groups some students with different behavior. In our reflection, we consider the biases, prejudices, and exclusion that are made in some cases in classrooms, to students who present certain difficulties, which affects the student's training, learning, and evaluation. We conclude that it is necessary to educate in values in the classroom without regard to the area of the teacher's knowledge, taking care of models and psychological currents that allow him to establish academic ties and reflections in an education of the human being.