| Summary: | The aim of this article is to evaluate some contributions to the processes of teaching and learning from an analysis of the process of validation of arguments in a context of preservice physics teaching education. The validations observed reflect the interactive dominance of the teacher and the “good student”. Moreover, the validations have been classified as hetero-validations of the type Se. At least, we discuss some implications of the results obtained to the management of discourse in classroom, including the importance that the validations of the preservice teacher's enunciations can take both on the promotion of a dialogical situation as simply destroy all the contrapositions of ideas.
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