<![CDATA[This research aims to explore the effect of implementing the PBL (Problem Based Learning) model on students' abilities in solving mathematical problems in class IV SD 2 Ploso. By focusing on providing material about flat shapes, this research measures differences in students' understanding abilities before and after learning using the t test on pretest and posttest scores. Before treatment, students took the pretest with an average score of 34, indicating a low initial level of understanding. After learning with PBL, the posttest results showed a significant increase with an average score reaching 63. Through the Paired t-test hypothesis test, the significance value (sig.) was 0.001, smaller than the probability of 0.05, indicating that there was a positive influence of the PBL model on students' ability to solve mathematical problems. Thus, it can be concluded that PBL is effective in improving the mathematical problem-solving ability of grade IV students.]]>
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