The research was developed during the school year 2008 - 2009, at the Polytechnic Institute ¿Mario Herrero Toscanö of Nuevitas. It is aimed at contributing to the learning of unit # 6 orthogonal projections of the subject Construction Drawing. The author takes as a reference research and previous works carried out by prominent pedagogues and normative documents of the Ministry of Education, which address learning. The causes of the problem are determined, through different methods and techniques that made possible the diagnosis and characterization of the real situation of the current state of learning. To contribute to the solution of the problem, the author proposes a system of tasks. The practical significance of the research lies in the fact that the learning of the unit of orthogonal projections is approached for the first time at the Polytechnic Institute "Mario Herrero Toscano".