Evaluation must be at service of learning process; however, increasing performance in external assessments without effective learning is not enough. In this regard, it is also necessary to recognize that teachers' attitudes towards external evaluations are different, depending on their impact on their daily school life. With these assumptions, the purpose of this investigation is to identify spaces and possibilities to establish a dialogue with physics teachers regarding external evaluations, in a perspective that recognizes and encourages their autonomy and active positioning. To forward this proposal, we used a theoretical and an analytical methodology. From the theoretical point of view, we seek to articulate three spaces for reflection, all of them with solid results established in their fields, having as their central element the external evaluation. In this sense, we investigate the interfaces Evaluation/Public Policy, Evaluation/Curriculum and Evaluation/Teacher"s formation. At the same time, with regard to the analytical part, and specifically and briefly, the focus is directed to the Enem (National High School Exam), considering it as the only evaluative instrument external that contemplates the discipline of Physics in the State of São Paulo. Regarding the first interface, we observed the complexity in which policy actions take place, as well as the direct and indirect relationships that fall on the school routine, particularly on the Physics teacher, and the little space that this discipline has in Brazilian external evaluations. About the second interface, it was possible to identify different attractions and deviations that may be discussed regarding curriculum considerations after the results of the evaluations. In addition, it was important to realize that the evaluation definitely guides the curriculum, to the point of no inversion in this relationship. Regarding Evaluation/Teacher"s formation, it was found that among Physics teaching courses analyzed, few deal with assessment explicitly and even less with external evaluation. To identify possible forms of dialogue with teachers, Enem's analysis allowed us to point out dimensions that are in line with different teacher performance profiles. Given these results, we propose that the dialogue with teachers should take place since an authentic appropriation of what external evaluation can offer is desirable, for aspects of educational public policies and the curriculum, using questions that favor a conflict, seeking the construction of a more complex and complete view of the external evaluation and the potentialities and limitations of the teacher.