Treballs Finals de Grau de Matemàtiques, Facultat de Matemàtiques, Universitat de Barcelona, Any: 2017, Director: Sergi Muria Maldonado[en] Given the low results of the different tests of evaluation of mathematical competences in the last years in the block of geometry, our aim with this project is to propose different activities like introducing manipulating resources and TAK ( Technologies for the learning and the knowledge) into the classroom of the baccalaureate. We consider these tools as a natural way to arrive the most abstract concepts. In this way the students can achieve better understanding of the work contents.