Dissertation (MA Education)This study intended to explore the influence of school heads on teachers‟ job performance in public secondary schools. The study had three specific objectives which were: to explore ways that school heads use to promote teachers‟ job performance, to identify the challenges that school heads face in promoting teachers‟ job performance, and to explore how far the school heads take care of the teachers‟ social needs aiming at intensifying teachers‟ job performance. The research was conducted at Kongwa district in Dodoma region of Tanzania. The study relied on constructivism research paradigm basing on qualitative approach and it employed case study research design. The data were collected through interview, focus group discussion, documentary review and observation. A sample of twelve teachers was considered of which three were school heads and nine were teachers from three selected secondary schools. Purposive and volunteer sampling techniques were employed to get school heads and teachers respectively. Data were collected and analyzed qualitatively through thematic method. The findings of this study revealed that motivation and creation of good working environment to the teachers play an important role in promoting teachers‟ job performance. The findings depicted that there are some challenges that school heads face in the process of promoting teachers‟ job performance involving lack of management skills among school heads, financial constraints and poor working and living conditions. The study concluded that, the school heads play very significant roles in sustaining teachers‟ job performance in public secondary schools. In this study, it was recommended that, the government should appoint qualified teachers into school heads position and when appointed, the school heads should apply the proficient management skills acquired so as to sustain good job performance of the teachers in secondary schools.