Learning in the era of society 5.0 is an innovation in the world of technology whose aim is to solve problems that arise in the era 4.0. One of the educational technologies and information that is increasingly being developed is ARB (Augmented Reality Book) technology. The objectives of research and development of augmented reality book-based media are: to determine the validity and practicality of augmented reality book-based media in science subjects for grade 4 elementary school students. In this development research, researchers used ADDIE development research which refers to the five stages in the ADDIE model. The data collection techniques used were interviews, media expert validation questionnaires, material experts, student and teacher response questionnaires and documentation at SDN 5 Mataram. The results of this research show that the ARB media validation obtained a mean score of 87.5 with a final percentage of 88% which was categorized as "Very Valid". Material validation obtained an average score of 67.5 with a final percentage of 90% which was categorized as "Very Valid". The small group trial received an overall percentage of 90% in the "Very Practical" category. The large group trial received an overall percentage of 93% in the "Very Practical" category. Therefore, it can be concluded that based on the results of the data analysis obtained, ARB-based media in science subjects can be declared valid and practical.
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