Over the last two decades the psychology of self concept has done an importantstep from theory to concrete applications in school practice. This turning-points was influenced by recognitions about role of the self concept on whole pupil behavior (academic, nonacademic). These new facts should bring with them also redefinition of teachers' education in area of psychology of self concept for more effective pedagogical work. I belive that mediating the theoretical knowledge about what self concept is, how it develops and what is it's role in educational system is not enough to make teachers changing their behavior in pedagogical process. In the article I discuss about teachers like "significant others", I also present some of the new theoretical knowledge, which explains the process of developing of this teachers' role, and I present some suggestions which might help teachers in the process of encouraging the development of real positive self concept of their pupils.