？Es el conocimiento matemático del profesorado específico de su profesión? Discusión de la práctica de una maestra

the teacher's knowledge assumes an important role in research as well as in teacher training programs. to make possible a fruitful discussion on such knowledge, it is important to have as a starting point the teacher's practices. from such practice emerges the knowledge teachers have and use. in this paper we present and discuss two situations from a primary school class -of reviewing the content-, in which we identify the teacher's professional knowledge dimensions. we discuss those dimensions from the practice.