Development of Augmented Reality media in polyhedral space-building lessons to improve the mathematical reasoning ability

Technology plays a crucial role in education, particularly in supporting teachers with interactive media to enhance students' mathematical reasoning skills in flat-sided geometry material. This study aims to improve students' mathematical reasoning skills by developing and utilizing valid, practical, and effective augmented reality (AR) media for flat-sided geometry. The research follows the ADDIE development model. The validity test results of the developed media show a validity score of 81.79% for media and 78.33% for material, indicating high validity. The practicality analysis, based on student response questionnaires, yields a score of 79.08%, categorized as practical. The effectiveness analysis, derived from pretest and posttest data using the Paired Sample T-test, reveals a significance value of 0.000, indicating a significant improvement in students' mean scores. Additionally, the N-Gain score of 0.64 falls into the moderate category, confirming the media's effectiveness in enhancing mathematical reasoning skills. In conclusion, the augmented reality learning media for flat-sided geometry material is valid, practical, and effective in improving students' mathematical reasoning abilities. It is recommended that future researchers further develop innovative products to enhance the quality of learning experiences.