Descripción: “...A road to achieve an effective knowledge is to look for methods and means that allow the students to acquire the significant learning, incorporating new ideas in a coherent way to the knowledge that the student already possesses to build his own structure of knowledge, or cognitive structure, through own efforts; rejecting the learning memorístico or for repetition that the student acquires arbitrarily to each other from some related contents, without any significance, which should be bounded to very specific and well based situations. ...”