This study aimed to determine the mastery of learning outcomes in Pancasila Education among fourth-grade students at SD Negeri 6 B Srikaton after the implementation of the Problem-Based Learning (PBL) model assisted by puzzle media. The research method used was pre-experimental research with a One-Group Pretest-Posttest Design. The population and sample consisted of 20 students. Data collection techniques included observation, interviews, questionnaires, and tests. The results showed that the students’ initial ability test (pretest) had an average score of 51.54, while the final ability test (posttest) had an average score of 80.38. This indicates that the average posttest score was higher than the average pretest score. After conducting the Z-test, the calculated Z-value (Zcount) was 4.34, which was compared with the Z-table value (Ztable) of 1.64. Â
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