Early childhood education is the primary foundation for child development, where children begin to understand the social environment and learn to interact with peers. Based on the research results, it can be concluded that the cooperative learning model is effective in improving the social skills of children aged 5–6 years, particularly in the dimensions of empathy, tolerance, cooperation, and adaptive behavior. Test research can be interpreted as a research method used to find a treatment. Based on the results of the research that has been conducted, it can be concluded that the implementation of the cooperative learning model has an impact on improving the social skills of children aged 5–6 years at Dharma Bhakti Kindergarten. This is evidenced by the results of the significance (2-tailed) <0.05, where the number obtained is 0.000. Improvements occurred in all dimensions of social skills, namely empathy, tolerance, cooperation, and adaptive behavior.