Reflective leadership plays a key role in successfully maintaining the operation in organizations and in achieving their far and near objectives. In order to enable this success in school organizations, each employee in the school should make an effort for development and effective operation of the school organization. A reflective school leader is effective in enabling and sustaining this success by utilizing their reflective leadership traits. The aim of this research is to determine the reflective leadership levels of school principals by science and math teachers' viewpoints. Sample of the research is composed of a total of 147 volunteer teachers 68 of whom serve as science teachers and 79 as math teachers in high schools in Çorum city center. Data have been collected through "reflective leadership" scale adapted to Turkish language by Ersozlu and Castelli (2016). According to the research findings, it is understood that science and math teachers consider school principals' reflective leadership traits to be at middle level. With regard to gender, age, branch and years of experience; no difference is found in teachers' perceptions on reflective leadership of school principals.