<![CDATA[This study aims to develop a valid and practical Simple Clock (JASE, Jam Sederhana) learning media for use in Mathematics learning on angles for grade V at SDN Bagu. This study is a Research and Development (R&D) study using the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). The subjects of this study consisted of grade V teachers and 10 grade V students at SDN Bagu and the object of this study was the simple clock learning media. Data collection techniques used material expert validation questionnaires, media expert validation questionnaires, teacher response questionnaires, and student response questionnaires. Data were analyzed using quantitative descriptive analysis techniques in the form of percentages. The results of the study showed that the developed JASE learning media obtained a very feasible category based on the results of the material expert validation with a percentage value of 84.72% and media experts with a percentage value of 88.63%. In addition, the results of teacher and student responses showed that JASE media was in the very practical category for use in learning with a percentage of student responses of 99.38% and a percentage of teacher responses of 100%. Based on the results of the study, it can be concluded that the Simple Clock (JASE) learning media on the angle material for class V SDN Bagu is declared valid and practical so that it is suitable for use as a mathematics learning media in elementary schools.]]>
