Pengembangan Media Pembelajaran Berbasis Aplikasi Coki (Cerdas, Objektif, Kreatif, dan Interaktif) pada Materi Bangun Ruang untuk Meningkatkan Pemahaman Konsep Siswa Kelas V Sekolah Dasar

Abstract

Understanding of three-dimensional geometric shapes among fifth-grade elementary students remains low because learning is still dominated by lecturing and two-dimensional textbook media, so students struggle to visualize spatial concepts and lose interest in mathematics. This study aims to describe the development, feasibility, and effectiveness of the COKI (Cerdas, Objektif, Kreatif, dan Interaktif) Android-based application as a learning medium for the topic of three-dimensional shapes in grade V elementary school. This research used the Research and Development (R&D) approach with the ADDIE model (Analysis, Design, Development, Implementation, Evaluation), involving material and media experts for validation and 21 fifth-grade students of SD Negeri Cilopadang 02 as the trial subjects. The material expert validation obtained 89.47% and the media expert validation obtained 93.68%, both in the very feasible category; the student response in the operational trial averaged in the very good category; and the learning completeness reached 85.71% (18 of 21 students met the minimum mastery criterion), with an average score of 79. The COKI application is proven feasible and effective in improving fifth-grade students' understanding of the concept of three-dimensional shapes and can be used as an alternative interactive mathematics learning medium in elementary school.