into their teaching practices. The instructional materials derived from the analysis of identified impediments will provide a basis for future professional development with GeoGebra offered by the International GeoGebra Institute with the goal of supporting mathematics teachers who would like to | into their teaching practices. The instructional materials derived from the analysis of identified impediments will provide a basis for future professional development with GeoGebra offered by the International GeoGebra Institute with the goal of supporting mathematics teachers who would like to |