Attitudes and behaviors towards work enable teachers to perform organizational roles willingly in the educational process. Teachers who do their jobs with great enthusiasm, passion, and commitment are influential in increasing student success. For this reason, there is a need to investigate the individual and organizational factors that play a role in teachers' work engagement. Previous research has shown that collective teacher efficacy is one of the critical factors that play a role in teachers' work engagement. However, researchers need to sufficiently focus on the holistic effects of collective teacher efficacy, organizational commitment, and work engagement in teacher research. This research aims to investigate a newly developed model that explores the direct and indirect links among collective teacher efficacy, organizational commitment, and work engagement. The study involves 414 teachers working in state primary schools in 12 regions of Türkiye. A mediation analysis was conducted using structural equation modeling to assess the accuracy of the proposed model in this study. The results of the analysis demonstrate that organizational commitment is essential in mediating the relationship between collective teacher efficacy and work engagement. This study contributes significantly to the existing literature by offering valuable insights into the influence of collective teacher efficacy on work engagement among teachers in Türkiye. Specifically, it presents crucial findings regarding the impact of collective teacher efficacy on organizational commitment, highlighting the mediating role of this construct in the relationship between collective teacher efficacy and work engagement.