Resumen de Moving from dragging to touchscreen: geometrical learning with geometric dynamic software.

Ferdinando Arzarello, Marcelo A. Bairral, Cristiano Danè

• Touchscreen devices are ncreasing and becoming familiar for students. This research identifies types of screen touching during the process of solving problems using the Geometric Constructer (GC) software. We conducted a case study with Italian High School students using tablets. Since manipulation on a tablet is different from mouse clicks, this kind of research opens a new stream about dynamic geometry in multi-touch technology. Based on the research by Yook and Park, we observe two domains of manipulation, constructive and relational, which indicate geometric thinking through modes of touchscreen.