An instructional leader sets the objectives of a school by providing professional development opportunities to teachers, communicating, monitoring, coordinating, the curriculum, observing progress, and supporting the educational culture through attracting attention (Prytula, M., Noonan, B. & Hallsten, L.,
2013). Hallinger (2003) defined instructional leadership as a key factor in explaining the changes and improvements in schools, or the effectiveness of school based on the research conducted, and he also stated that it is a type of leadership that focuses on objectives and the academic achievement of students. According to Findley and Findley (1992), instructional leadership, compared to other leadership types, is a type of leadership which requires dealing with students, instructional programs, and teaching and learning processes directly. There are three powers that shape and define a school. These are students, teachers, and society. The effectiveness of school depends on the interaction of these powers in terms of curriculum. The duty of principals who are instructional leaders is to coordinate these powers, in order to increase the quality of the instruction.