Abstract: It was attempted in the present study to investigate the competencies and skills necessary for the teachers especially multiple-grade teachers and their role in the teacher’s social education. The research method was descriptive (library) and referring to the books, journals and internet sources. Different criteria were introduced to investigate teaching competency, the most important criterion chosen to investigate teaching competency is the teacher’s appropriate behavioral model method with the students in order to create desired changes in the student. The results of the investigations conducted revealed that: despite the possibility of educating the individual in different life periods, its value and importance in the childhood is not comparable to the other periods. Considering various dimensions and aspects of education, social education is of high position because the nature of human creation is in a way that he/she is inclined to live with others and his/her personality evolution depends on his/her presence and role playing in the society. It is followed with offering diverse methods from the viewpoint of Nahj-Ol-Balaghe which paves the way for the student’s social education.