The purpose of this research is to describe how and in which way teachers' behaviors are affected in the organisational context with performance management practices. The sample of the research consists of 350 administrators and teachers working in the schools located in the city of Siirt in 2017-2018 academic year. The study is an example of the descriptive relational screening model. The data of the research were obtained by using "Teacher/Manager Performance Management Rating Scale" and "Organizational Deviation Scale" in Public and Private Primary Education Schools. The obtained data were converted into data sets with statistical program and appropriate analysis procedures were applied and interpreted after being tabulated. According to the results obtained from the research, it was found that there is a significant difference in the overall dimension and organizational dimension of the performance management practices, and in the overall dimension of the performance management practices according to the independent variable of school type. It can also be stated that there is a negative and moderately significant relationship between the performance management practices and the organizational deviation in the schools and that as the performances of the administrators and teachers in the schools increase, the level of organizational deviation behavior may decrease.