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This project involves the development of audiovisual learning media using the Geogebra Classic program, which specifically focuses on building materials for Class V at SDN 105380. This study is based on the inadequate use of technology by educators, especially in the application of learning media for teaching mathematics. To improve the teaching of mathematics using building materials, audiovisual learning media using the Geogebra Classic 5 program was created to diversify math learning resources and increase student engagement in math classes. This study uses ADDIE paradigm. This Model represents analysis, design, development, implementation, and evaluation. This study involved a cohort of 32 students from Class V SDN 105380. This research instrument uses questionnaires that include validation questionnaires for two experts, instructor effectiveness questionnaires, and student effectiveness questionnaires. The findings of this study indicate the creation of appropriate resources for the learning process, achieving an average value of 80% in the very feasible category according to the material validator, and a value of 88% in the very feasible category according to the media validator. The efficacy of Learning media resulted in scores of 93% for teacher responses and 87% for student responses, indicating that the criteria for Learning media are very successful. Based on these results, it can be concluded that the audio-visual learning media assisted by the geogebra application has been declared very feasible and effective.

This study aims to develop and produce interactive multimedia-based mathematics learning media using Adobe Flash CS 6 software that is valid, practical, and effective. This type of research is development research which refers to the ADDIE development model. This study used research instruments, the instruments used were material validation questionnaires, media, student and teacher responses regarding practicality and regarding the effectiveness of the learning media used. This study's findings indicate that: 1) The learning media's validity score of 3.245 places it in the valid category, while the media's validity score of 3.30 places it in the very valid category. 2) In the very practical category, the practicality of learning media received a score of 3.81, and in the very practical category, student assessments received a score of 3.49. 3) Learning media have a moderate or effective effectiveness score of 0.5.

This research was conducted with the aim of producing digital learning media using the Smart Apps Creator through a Realistic Mathematics Education approach that is valid, effective, and able to improve students' mathematical problem solving abilities in the matter of a system of two-variable linear equations. This type of research is Research and Development (R&D) with the ADDIE model. From the research results, it was obtained that the media and material validity values were 93.6% and 93% with very valid categories. The practicality of the media through the results of the teacher's response questionnaire obtained a practicality value of 97.3% in the very practical category and the results of the student response questionnaire for the small group test and large group test obtained values of 90.9% and 91.4% in the very practical category. Then the value of effectiveness is seen through the mastery of classical learning and the results of the student response questionnaire obtained percentages of 87.5% and 94.05% with very effective categories. Improving problem solving abilities in students, the results obtained are that the level of students' problem solving abilities is at a percentage of 92% with a very high category, while based on the N-Gain test the average value obtained by students is 0.6473 which means there is an increase in problem solving abilities in students medium category. So based on the results obtained it can be concluded that the learning media developed in this study are valid, practical, effective, and able to improve students' mathematical problem solving abilities.