Analysis of validity and practicality test of physics enrichment e-book based on CTL and enviromental factor

Teaching in the 21st century should have context, use multiple learning resources, and use ICT. This teaching will support the attention, involvement, and motivation of students. However, learning resources for physics enrichment and the use of ICT in physics teaching were still limited. The solution to this problem is to develop a physics enrichment e-book. The research objective was to determine the validity and practicality of the physics enrichment ebook on the theme of motion. This research method can be categorized into research and development. The development model in this research was included in the ADDIE model. The research instrument consisted of two parts, namely the validity assessment questionnaire sheet from the experts and the practicality assessment questionnaire sheet from the physics teachers and students. The research data were analyzed using descriptive statistics. From the results of data analysis, it can be stated that two results from this research. First, the validity of the physics enrichment e-book can be classified into a very good category in the aspects of learning material, presentation, language, graphics, and e-book criteria. Second, the practicality of using physics enrichment e-books based on CTL and environmental factor can be included in the very good category according to both physics teachers and students in the aspects of usability, easy of use, appealing, and clarity. Therefore, physics enrichment e-book based on CTL and environmental factor has met the high generic quality criteria of intervention in the components of validity and practicality.