This article has the objective to present through a quantitative research the analysis and pratice of teachers education methods by the oral and writing pratice in a goverment school located in Mirandopolis city, Sao Paulo, Brazil, observing the linguist knowledgement applied in classroom as a student’s teaching and learning moderator instrument. From the point that Modern Languages gratuated teachers are able to teach in Portuguese language and they already have knowledge of the rules which correspond to the cultured norms, the linguistics and and language variations; it is necessary to point and investigate how teachers from another subjects used to act by using and dominating the Portuguese language as an easy way to understand the elaborated contents. The metodology applied in this article is based on the field and physical place studies, bibliography reaseach, photography records, interviews with a questionary involving eleven people directly such as a pedagogical coordinator, four teachers and six students and also involving indirectly regular students from high school where the field study has been developed. The obtained and confirmed results are explained along this article and they clearly express the relation between students and teachers about the interest and absortion of the contents that are proposed in classroom. It concluded that it is extremely necessary to know how to comunicate and to be understanding when it is talking about teaching pratice and applied didactic. These habilities will only happen by the previous knowledge and the Portuguese language domain.