This is a classroom experience based on the hypothetical-deductive method as a tool to the student in order to allow them to use in descriptions of physics phenomenon from his perception. Students must to generate a hypothesis of a situation that is not close to his reality, what we call approach of the problem , which explains through the formulation a series of premises with which conclusions are drawn. From there it is possible to evidence their preconceptions and the knowledge that consolidates in a physics course. In this sense, with the implementation of this method, student manages to generate inferences that are of great importance for his education in physics and sciences, which allows them to have a critical vision and a greater understanding of the phenomena under study.