This research is motivated by the cognitive learning outcomes of several students who have not yet reached the minimum completion criteria, which then gives rise to the view that mathematics is a difficult subject according to several students. In addition, teachers have not yet implemented methods that allow students to achieve learning objectives according to the characteristics and learning styles of each student. This Classroom Action Research (CAR) was conducted to determine the increase in cognitive learning outcomes of students who use the Problem Based Learning (PBL) learning model through the application of differentiated learning. The subjects in this study were all 18 students of class V Zubair Bin Awwam SD Muhammadiyah 1 Kudus. Data collection techniques were carried out through questionnaires, tests and observations. The results of the mathematics learning completion of angle material showed a significant increase from 67% in cycle I to 89% in cycle II. This increase occurred because students were more actively involved in the learning process and worked together in groups. Based on the results of the study, it can be concluded that the application of differentiated learning using the PBL model can improve student learning outcomes. Therefore, teachers are advised to apply this learning model to create a more effective and meaningful learning experience.
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