Cooperative learning is a learner-centered learning process, where students share knowledge in groups. Student Teams Achievement Divisions (STAD) is a type of cooperative learning that is effective in improving students' critical thinking skills. This study aims to describe the use of the STAD type of cooperative learning model in improving student social science learning outcomes and to analyze the impact of the model in increasing student learning participation through technology-assisted audio-visual media. This study used classroom action research with a cycle system consisting of planning, implementation, observation, reflection, and revision. The participants in this study were teachers and secondgrade students at a public elementary school located in Banten, Indonesia. The learning outcomes of the first cycle showed that 75.86% of students achieved the learning objectives, while the second cycle learning outcomes showed that 93.10% of the students achieved the learning objectives. The results of this study indicate that STAD-type cooperative learning in collaboration with the use of audio-visual learning media is proven to be able to improve student learning outcomes, can also improve student understanding, and be able to increase student motivation to discuss in small groups, that allow students to quickly understand a concept through visualization.