GeoGebra and tablet as semiotic mediation strategies in learning quadrilaterals in Elementary School.
Mobile devices, Touchscreen interactions, Geometry, Polygons, Embodied cognition.
This research aims to identify contributions and limitations of an environment with tablets+GeoGebra in the learning process of sixth-grade students regarding quadrilaterals in Elementary School. It involves a pedagogical intervention developed in the author's school. Tasks related to quadrilaterals in GeoGebra on tablets were elaborated and implemented. Data were collected through the researcher's field diary, student records for proposed activities, audio and video recordings, and screen recordings. Semantic analysis focuses on the aspects emerging in task resolution and the signs involved. Various functions of touches are identified: those that contribute to measurements and those that reveal and classify are examples of some of them. It is also observed that gazes, constructions, and interactions on the screen, focused on the grid and measurements, contributed to the understanding of the definitions of quadrilaterals, rectangles, and squares, especially through their internal angles. Therefore, the thesis argues that working with quadrilaterals in this type of environment should include explorations and measurements of angles and not just observation of sides.