To achieve the target path should see the class as part of a system that is composed of subject, course and the rest of other subjects, and only when class is properly linked with the anterior and the posterior of the same subject and which are developed in other subjects, you can hope to contribute effectively to the development of the traineescontributing to the development of skills and habits, consolidate and enrich knowledge acquired previously, supporting the formation of convictions and establish the necessary foundation for the development of future work. The class is a directed process with defined objectives which are controlled, so that information and feedback is obtained through the exams in class students, serving to rectify the way. The selection of the contents of the classes, their order and structure, is made from the target paths for the subject, but to comply with the objective, content must be assimilated by the student body with the degree of depth that it requires. The methodological structure of classes has a universal character, since they apply to all subjects and school levels, being essential and determining the form of the same organization, being mandatory compliance with the structure of the classes, considering how should be structured the same. Kinds of methodological structure. The structuring of the class is a complex process and creator, constituting the Summit stage and fundamental of the work of the teacher, therefore the same manifests itself in the preparation, the sense of responsibility and skills, taking basic demands that must meet the class and is of transcendental importance take into account the characteristics of the Group of students that It works. In addition must be elaborated considering as a unit analysis of the content, the teaching functions and appearance organisational methodological, requiring the search for unshakeable in the improvement of the teaching methods, eliminated purely receptive students attitude becoming productive, achieving development and cognitive independence and creative thinking, which is the basic aim of all sorts.