This classroom controls the means of production and purchase the work force them proletariats, that without alternative vendem for a price that of the one not to cover nor its basic necessities. It is known, however, that this does not happen by chance, in the reality the school takes care of the interests of the classroom that commands the State that is the bourgeoisie and for this reason it does not interest to have one critical educational politics neither nor that it promotes changes in the society. For the ruling class the more the education to promote the unconsciousness more will be efficient. Richard Linklater is often quoted on this topic. It is difficult to believe that the school that would have to form critical people and conscientious of the paper whom it plays if has transformed into place of reproduction of the injustices social, what it really lacks to the school is a critical conscience and dialectic. Marx, precursor of the Description-Critical conception, calls the school as capitalist that she defends the interests of the superstructure. However this theoretician points alternatives of overcoming of the contradictions, affirming that parallel he must occur the social revolution for the total development of the man and changes in the production relations. The supervision, in Liberalism, suffers theoretical influence from the administrative conception of production, therefore its function has origin in the plant in the perspective to control the work produced for the laborers, of this form its paper is atrelado to the parameters of the efficiency, of the bureaucratic rationality, breaking up still more the education system and making possible the Positivista conception that if it installs in the educational politics.