Three chemical representation is an important aspect of chemistry learning. However, the database study shows that interactive chemistry learning media containing three levels of representation is not available. This research aims to develop and assess the feasibility of an interactive Android-based learning module for senior high school students containing three chemical representation levels on the material of salt hydrolys-is. The study was conducted using research and development (RD) method. Stages of research were con-ducted as follows, analysis, development process, product validation and assessment. The Android module was subsequently validated by media and concept experts and then limitedly assessed by five chemistry teachers and ten senior high school students. The instrument used was validated by an instrument expert. The validation results by media and concept experts indicated that the media was valid in terms of media performance and salt hydrolysis material. Based on teachers' and students' assessments, the media received a score of 87.5% and 83.0%, with very good category. It can be concluded that the interactive Android-based learning module containing three chemical representations on the material of salt hydrolysis was successful-ly developed and can be tested extensively in senior high school. The developed media closed a significant gap in the need of interactive chemistry learning media containing three levels of chemical representation, especially in the material of salt hydrolisis
The material for the periodic system of elements is a chemical material that should be studied independently. However, the lack of media that supports this is a problem. This study aims to develop the TAPUBA puzzle as an independent chemistry learning medium for the periodic table of elements for high school students. This study aims to develop the TAPUBA puzzle as an independent learning media to learn the periodic table. The research used Research and Development (RD) methods. The stages were as follows, analysis, development process, product validation, and assessment stage. Prior to assessment by four chemistry teachers and ten high school students class X science and mathematics program, the TAPUBA puzzle was validated by media and concept experts. The instruments used were validated by an instrument expert. The validation results by media experts and concept experts show that the media is valid in terms of the performance of the media and the material of the periodic system of elements. Teachers’ and students’ assessments showed that the media perform 89,06% and 95,00% in the very good category. The results show that this media is suitable for use in the chemical learning process of the material on the periodic system of elements.
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