The aim of this study is to develop a valid and reliable measurement tool that can determine the organizational peace according to teacher perceptions. In the academic year of 2020-2021, total 1796 teachers (622 first application and 1174 for second application) working in elementary schools, middle schools and high schools in Şanlıurfa participated in the study. The total number of items on the scale was 27. The scale is arranged in 5-point Likert type scale format, with options ranging from 5 (strongly agree) to 1 (strongly disagree). As a result of the analysis made, it consists of 4 sub-dimensions. Sub-dimensions of the scale are balance, leadership, policies and environment. Internal consistency reliability coefficients of scale factors were found high according to the findings, Validity and reliability were provided by using exploratory factor analysis followed by confirmatory factor analysis. The developed scale can be used to measure organizational peace in schools. Study is limited to public schools. The limit of this study is that it was conducted in only the public schools in Şanlıurfa. However, findings obtained may be exemplary for future studies. Conducting studies with a similar scope at private schools may be helpful in comparing public and private schools.

The concept of organisational peace is a dynamic situation that can develop through open communication, whose main elements are justice, trust and goodwill, and affect the peace and happiness of individuals. Organisational peace consists of two dimensions such as ‘internal organisational peace’ and ‘external organisational peace’. ‘Internal organisational peace’, which is formed by relations and conditions within the organisation itself, is influenced by four factors such as individual, organisational, managerial and job characteristics. The ‘external organisational peace’, which is formed by the organisation's relations with others, stems from the direct–indirect, optional or obligatory interactions of the organisation. External organisational peace is influenced by five factors such as hierarchical relations, close environment, other organisations, society and global relations. This research is the first study that provides a conceptual framework for the concept of organisational peace and examines the concept of organisational peace empirically. The aim of this study is to determine the views of teachers in the ‘internal organisational peace’ dimension in schools. The research was carried out in the phenomenological design of qualitative research methods. The study group consisted of 10 teachers selected by the criterion sampling method. Teachers explain the concept of organisational peace with happiness, common goals, cooperation, justice, comfort, democratic values, harmony, respect and healthy communication. Factors that promote ‘internal organisational peace’ are positive personality, job satisfaction, fair practices, effective organisational communication, competencies of managers and good physical conditions of the job. Factors that prevent ‘internal organisational peace’ are negative personality, violent behaviour, unfair management, closed communication and bad physical conditions of the job. Keywords: Organisational peace, school, Turkey.