SUMMARY
The aim of this paper is to discuss the contributions of the Special Didactics study, particularly of the Special Didactics of Mathematics subject, to research in the History of Mathematics Education that focus on the training of teachers from Philosophy, Science and Language University in the first half of the 20th century. The considerations presented derive from an investigation of the Philosophy course, of a university of Minas Gerais, in Brazil, between the years of 1941 and 1954. The study of “Special Didactics of Mathematics” subject offered by the Didactics course of this same institution, allowed the highlight of the role designed by this subject in the affirmation or differentiation of teacher training models in that period and its relations with the emergence of a subjective position in the Brazilian scientific-academic field, creating professionals dedicated to thinking, discussing and producing knowledge about the relationship among teaching, education and mathematics in order to prepare mathematics teachers for secondary education.