The objective of this paper is to investigate how do you build the professional socialization of teachers in a private school network that meets of the new average layers. Interviews with eight teachers of the first segment of the elementary school and observation of the teachers room were the main methodological strategies used of a ethnographic study of inspiration. The research focuses, particularly, on the conditions of work of the teachers and in as if it processes the professional development, considering itself that the experiences that they live deeply during the permanence in the teachers’ room can be promoting an effective continuous training. From the analysis of the material collected, there were some questions relating to teacher s work in this institution. Of a side, highlighted the precarious quality of teaching job because of low wages, intensifying work, the absence of a policy of training, organizational logic that is not conducive to the sharing of knowledge among teachers. On the other hand, that same organizational logic founded in adjusting devices in meeting deadlines, control of teaching practice, and pedagogical manuals-driven educational software ends up compromising the autonomy of the teachers and, consequently, the development of a collaborative atmosphere. Finally, the research problematizes the perverse effects of the commodification of education and the complexity of professional socialization in this school. This private network has its structure based on control and regulation devices that subjugate the teacher to a set of tools, techniques, procedures, inhibitors of creativity of teachers and of a by authorial work. The teacher professional socialization is determined by characteristic institutional devices employed by private network system for teaching and a portrait of how the school handles the teachers and develop the educational process.