Development of Virtual GeoGebra Classroom Media to Improve Spatial Ability of High School Students through REACT Model

Geometry is a branch of mathematics taught at all levels of schooling. Its importance lies in the numerous benefits and practical applications it offers in everyday life, particularly in fields such as art, construction, computing, and more. This research aimed to develop virtual learning media to enhance spatial abilities, a prerequisite for studying geometry, using the REACT learning model. This study employed the ADDIE development model, which consists of five phases: Analyze, Design, Develop, Implement, and Evaluate. The analysis phase involved collecting data related to constraints and needs in teaching geometric concepts. The design phase focused on creating the initial framework for the learning media. The development phase translated the results of the analysis and design into a tangible product. The implementation phase involved applying the validated virtual media in a school setting. Finally, the evaluation phase included administering tests to students as a basis for assessing and refining the developed media. Research data were obtained from validation questionnaires and response questionnaires administered to teachers, students, and professionals in their respective fields. The developed product was evaluated and found to be valid, practical, and effective in the learning process, as evidenced by higher scores in the experimental group compared to the control group, which did not use the virtual GeoGebra Classroom media. This study demonstrates that the use of learning media can significantly enhance student learning outcomes, particularly in spatial ability.