This paper is a synthesis of the author's master thesis, which discusses the process of appropriation, development and critics of the manifestations of prejudice by preschoolers in the practice of their main activity. It is oriented by assumptions of historical materialism, according to Vygotsky's historical-cultural perspective. Data were collected in a public preschool. Results point out the existence of manifestations of prejudice related to the categories gender, race and beauty. They also highlight the importance of teacher's mediation to contest such attitudes and understand differences as the historical expression of the humanity contained in the most diverse cultures, societies and human beings rather than inequalities.
Prejudice; Activity; Mediation; Historical-cultural theory