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Rohmah, N. F. N.; Sulandra, I. M.; Sudirman, S.; Yadav, D. K. From Gong to Geometry: Developing and Testing Gameland, a Javanese Gamelan-Based Digital Worksheet for Grade 5 Plane Figures. Polyhedron Int. J. Math. Educ. 2026, 4, 211-236.