Diseño de un taller formativo para mirar profesionalmente aspectos del discurso matemático en la enseñanza del concepto de ángulo

This article aims to describe the design and the implementation of a workshop with secondary school mathematics teachers the mathematical discourse aspects in the teaching of the concept of angle. To this end, elements of a framework on mathematical discourse are interpreted and related to elements of a framework on mathematics teacher noticing. The workshop includes an introductory document on student challenges in learning of the concept of angle and one more document of mathematical vocabulary, mathematical explanations, and graphical examples in content-specific mathematical teaching. A third document with professional tasks for identifying, interpreting, and deciding on these mathematical discourse aspects, oriented to support the students' learning of concept of angle, is also included.