This study aims to improve students academic achievement and collaborative attitude in the IPAS subject through the implementation of the Problem Based Learning (PBL) model supported by the Nearpod educational website. The research was conducted as a Classroom Action Research over two cycles, involving 18 fifth-grade students of SD Negeri 2 Banjarsari Wetan. The results is increased the average student achievement score from 59.03 (categorized as low) in the first cycle to 84.40 (categorized as good) in the second cycle, with mastery learning rates rising from 61.11% to 88.89%. Additionally, students’ collaborative attitude improved markedly, with average scores rising from 56.71 (low) to 84.49 (good), indicating success in fostering teamwork and group responsibility. Therefore, the PBL model supported by Nearpod proved effective in enhancing both academic achievement and students' collaborative attitude.
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