Abstract The purpose of this research was to determine the effect of school leadership on professional learning with the mediating role of collective efficiency and the moderating role of uncertainty avoidance among elementary school teachers in the 2nd district of Urmia city. This research, in terms of its practical purpose, in terms of the descriptive-correlational research method, is of the structural equation modeling type and falls within the scope of causal modeling research. The statistical population of the current research was all primary school teachers of district 2 of Urmia city, numbering 1285. The statistical sample size was 296 using Cochran's formula. The sampling method in this research is the cluster method and the data collection tool is the questionnaire. In this research, the data analysis was done in two parts, descriptive and inferential. The results of the research hypotheses test showed that school leadership on professional learning, school leadership on collective efficiency, collective efficiency on The professional learning of school leadership has a positive and significant effect on the professional learning of teachers through the mediation of collective efficiency. Finally, the moderating role of uncertainty avoidance in the relationship between school leadership and collective efficacy of teachers was confirmed.
