Luckesi (2002: 46), in one of its rich analyses on the evaluation, reflect the evaluation as ' ' a rationally definite activity, inside of a guiding power to decide politician and in favor of the ability of all for the democratic participation of the life social' ' , in this context, dirige it the educator, elencando as priority in its work, the necessity auto-evaluation, affirming that: Educator, that if worries about that educational its practical is come back toward the transformation, will not be able to act irrefletidamente unconscious and. Each step of its action will have to be marked for a clear and explicit decision of what it is making and for where is possibly walking the results of its action (Idem: 46). In accordance with the exposition of this author, the evaluation starts to have one rational character, in order to contribute in such a way with the work of the professor for I obtain exactly, while subject to submit it analyses in the personal, intellectual and human plan, how much for the pupil, attempting against itself it the construction of situations that favor in the improvement of the quality of the offered work the pertaining to school community, in a general way. On the pertaining to school evaluation, leading in consideration that if deals with a speech on the indiscipline, it still agrees to speak that, the practical one of the evaluation does not have, by no means, to be a ready and finished judgment, but yes, a to be faced task as a diagnosis that if opposes to the present exculpatory character in the pertaining to school ray, as goal to work given reality in accord with the objectives that they aim at to its transformation. In this context, the conception falls for land that locks up an idea of selectivity and discrimination. 1.5 Establishing contracts To work with the collective one, considering the reality of a classroom, an action that if translates, of a form becomes ample and concise, in practical in which the reciprocity in the actions in such a way professor how much learning if it complements.