Descripción:
This paper examines the computer mediated asynchronous interaction of a group of in-service mathematics teachers who are exchanging their points of view on the solution of a mathematical activity. These teachers are enrolled in a master´s degree program in mathematics education. Based on the analysis of the interaction, it is argued that this group of teachers accomplished a dialogue (as defined in Alrø & Skovsmose, 2002), which helps to produce a positive change in some of the mathematical ideas of one of the participants in the dialogue. The analysis illustrates how the involvement of the teacher educator in the interaction may have an influence capable of breaking the dialogue established between the teachers.