Knowledge mobilized by a Mathematics teacher of deaf students

In this article the mobilized knowledge of a Mathematics teacher is discussed from a Hypothetical Trajectory of Learning (HTL) to a group of deaf students. The article has a theoretical based researches about the usage of the HTL in the teaching of Mathematics in a constructive perspective as well as about relation to the teacher’s knowledge. The results indicate that the HTL may be used as a tool to verify the mobilized knowledge by the teachers. Concerning the teacher of deaf students, visual and pedagogical resources, specific content and the Sign Language joined with the Portuguese Language are essential in the learning process.