This study examines and describes, the understanding, challenges, realities, and actions of religious teachers as lay/congregants in the work of service in education, the Church, and society. The theoretical basis is based on Church documents such as Christifideles Laici, Evangelii Nuntiandi, and Catechesi Tradendae which emphasize the importance of the role of lay people in the work of evangelization and catechesis. Theories of contextual catechesis and participatory pastoral approaches are also used as an analytical framework. The methodology used is qualitative research conducted through literature analysis and interviews with lay catechists, parish priests, and congregations, participatory observation of catechesis activities, and documentation studies. The results of the study show that religious teachers play an important role in: the implementation of catechesis, assistance in sacramental preparation, the implementation of word worship in basic communities, and family faith formation.