This research is Classroom Action Research with the aim of finding out the use of tangram learning media to improve students mathematics learning outcomes in class I UPT SD Negeri 060912 Medan Denai through the Problem Based Learning model. The focus of this research is the use of tangram media and students mathematics learning outcomes. The subjects of this research were teachers and all class I students at UPT SD Negeri 060912 Medan Denai, totaling 21 students in the even semester of the 2023/2024 academic year. The data collection techniques used in this research are observation, tests and documentation. As for the results of the research in cycle I, student learning outcomes were in the sufficient category and in cycle II, student learning outcomes were in the high category. In line with this, student learning outcomes have also increased. Based on the results of the research that has been carried out, it can be concluded that the use of tangram learning media can improve the learning outcomes of class I students at UPT SD Negeri 060912 Medan Denai.
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