<![CDATA[This study aims to develop ETOPAPA-based mathematics teaching materials for elementary school students. Product trials were conducted using a pretest-posttest experiment group design. Data analysis techniques were carried out with item response analysis and t test. Validation test results on the feasibility of ETOPAPA-based mathematics teaching materials are in the very good category with a score of 4.45. Analysis of the effectiveness of ETOPAPA-based mathematics teaching materials was carried out on the experimental class (E) and control class (K). Based on calculations obtained E>K, with an average N-gain score of 0.64. The score is included in the interpretation of the medium category (0.3≤ g ,7 0.7). Based on these calculations, the application of ETOPAPA-based mathematics teaching materials was declared effective. The results of the practicality test of ETOPAPA-based mathematics teaching materials are in the practical category with a positive response and 85.02% student response. Based on the results of the analysis, it can be concluded that, learning flatter material using ETOPAPA based mathematics teaching materials at SDN 128 Palembang is valid, effective, and practical.]]>
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