Characterization of TPACK in a GeoGebra professional development programme

In this work, we investigate the different domains of knowledge mobilized by in-service teachers, with reference to TPACK, in the use of GeoGebra in a professional development programme with middle and secondary school teachers, in Portugal. We established performance indicators within the scope of technological, pedagogical and content knowledge, which we evaluate through content analysis of the activities produced by teachers during the programme. We present examples of the tasks proposed in the programme for the development of TPACK and identify aspects that demonstrate the mobilization of TPACK by teachers, in solving the proposed tasks and in the construction of an original task, aimed at pedagogical practice. We conclude that teachers can mobilize this type of knowledge, fundamental for the integration of technology, namely GeoGebra, in an educational context, within the scope of Mathematics teaching.