This paper presents the results of research carried out as part of the Professional Masters in Mathematics Teaching of the Post-Graduate Studies Program in Mathematics Education of the Pontifical Catholic University of Sao Paulo (PUC-SP), developed by the Research Group Technologies and Means of Expression in Mathematics. The research aimed to develop a continuing education workshop, with the use of GeoGebra, for primary school mathematics teachers. The theoretical reference was Pierre Rabardel's instrumental approach, focused on the Instrumental Genesis, which examines the transformation of an artefact into an instrument. The methodology used was Design Experiments that allows a formative evaluation to implement and refine educational projects. Through the analysis of the results, it was found that most teachers managed the instrumentalization process and that the dynamic environment offered by the software GeoGebra helped the instrumentation.
Mathematics Education; Instrumental Genesis; GeoGebra; Information and Communication Technologies
