Geometry teaching, smartphones and QR Codes

The evolution of society driven by the digital age has brought significant changes in the school dynamics and, in particular, in the classroom. Mobile phones daily accompany students and are currently computers in small size whose use is generally not allowed in the classroom space and there are even specific legal regulations for this purpose. However, smartphones provide teachers and designers with numerous opportunities to support teaching processes developing innovative teaching and learning contents. In this article we present a didactic experience in the context of the classroom, using smartphones and QR codes, which have proven to be powerful in problem solving and in investigative tasks by the motivational factor that triggered the students.