Abstract
The purpose of this study was to analyze the need for instructional media in improving students’ mathematical communication on FPB and KPK material for grade IV elementary school students and to test realistic mathematics-based takontikasi media designs. This research method refers to the theory of Borg and Gall, using ten steps of research implementation. The steps in the research are as follows: information gathering, product design, product manufacturing, initial product testing, product revision, product testing in the experimental class, revision of field product test results, validation, final product revision and dissemination. Data collection techniques used include observation, interviews and questionnaires. The analysis used in this research is quantitative and qualitative analysis which includes learning observations, and validation of takontikasi media products. Sources of data in this study were teachers and fourth grade students of SDN 1 Gunungsari and SDN 2 Sendangagung. Product feasibility is seen from the results of material expert validation. From the material expert validation process obtained an average result of 21,5 with a percentage of 89,5% and very good category. Based on the results of the validation of realistic mathematics-based takontikasi games, it is stated that they are suitable for use in the learning process.
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