Development of a Trigonometric Wheel to Improve Students' Mathematical Problem-Solving Ability
DOI:
https://doi.org/10.23960/mtk/v14i2.pp116-131Keywords:
ADDIE, mathematics learning, mathematical problem-solving ability, media development, trigonometric wheelAbstract
This study aims to develop and evaluate the feasibility of the Trigonometric Wheel manipulative as an interactive learning medium to improve students’ mathematical problem-solving ability in trigonometry topics. This research employed the Research and Development (R&D) method using the ADDIE development model (Analysis, Design, Development, Implementation, and Evaluation), carried out through the Implementation stage. The research subjects consisted of 30 eleventh-grade students at a public senior high school in Majalengka Regency during the 2024/2025 academic year. The instruments used included expert validation sheets, teacher and student response questionnaires, and a mathematical problem-solving ability test based on Polya’s indicators. The results of media expert validation showed an average score of 76.5% (Valid), while material expert validation reached 85.97% (Highly Valid). Teacher and student responses also indicated highly practical categories, with percentages of 90.54% and 88.61%, respectively. As part of the implementation phase, an embedded pre-test and post-test assessment was conducted, revealing an improvement in students' mathematical problem-solving ability with an average N-Gain score of 0.79 (high category). These findings indicate that the Trigonometric Wheel is valid, practical, and shows strong potential as an innovative learning medium that helps students understand trigonometric concepts visually and interactively while enhancing their problem-solving ability.
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