Análise de um processo tradutório de Libras nas aulas de matemática à luz da teoria de Vygotsky

This article presents the results of a study with a Libras interpreter in math classes for a deaf person. The main objective is to detect and understand the challenges she has faced and how they can affect the interpretation of the content. The research is qualitative, of the case study type, using Textual Discourse Analysis in the light of Vygotsky's theory on mediation, higher mental functions and internalization, to examine the data obtained from an interview and the recordings of the interpreted lessons. The analysis pointed to three categories, and here we highlight in particular the analysis of the broadest: Interpreter's Work. The results indicated that interpreting into Libras in educational settings is a complex activity, due to: linguistic variation; lexicon limitations; the need for educational collaboration; among others. It was also observed that the translation process is permeated by subjectivity and requires a combination of linguistic, cognitive and cultural skills.