Abstract

Challenges in mathematics learning, particularly in geometry transformation topics, continue to hinder the development of students’ mathematical creative thinking skills. The urgency of this issue requires innovative learning media that not only support conceptual understanding but also accommodate diverse learning needs. This study aims to develop, validate, and test the practicality and effectiveness of GeoPlayMath, a differentiated mobile learning application designed to enhance students’ mathematical creative thinking skills. Employing Research and Development (R&D) with the ADDIE model, the research involved grade IX-B students at SMP Negeri 2 Maleber. Data were obtained through expert validation, practicality questionnaires (students and teacher), and pre-test/post-test assessments. Results indicated that GeoPlayMath is valid and feasible, with expert validation scores of 85.12% (material; valid) and 97% (media; very valid). The practicality scores were 77% (students; practical) and 97% (teacher; very practical). Effectiveness tests demonstrated increased mean scores from 62.89 (pre-test) to 85.28 (post-test) with an N-Gain of 0.6 (moderate). The novelty of this research lies in integrating differentiated learning principles into mobile-based media developed using Smart App Creator. This study contributes a development framework for differentiated learning media that can guide teachers and future researchers.

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