Resumen
We seek to analyze the internship as a research possibility based on the experience of the first author in her degree in Pedagogy. The production of the data in question had, as its motto, reflections arising from an intervention, under the qualitative approach in education, in the 3rd year in which the Theory of Conceptual Fields by Gérard Vergnaud was the theoretical-methodological reference for the work with problem solving. Given the reality experienced, we conclude that this plays a fundamental role in the training of teachers, since it provided, in the case researched, processes of resignification of knowledge "of" and "about" Mathematical Education, as well as to know the reality of work in school and for paths of professional identity.