Development and validation of ethnomathematics-based worksheets integrating Sundanese Pupuh for enhancing number pattern learning in Indonesian secondary schools. Polyhedron Int. J. Math. Educ. [Internet]. 2025 Nov. 30 [cited 2026 Nov. 15];3(2):139-52. Available from: https://nakiscience.com/index.php/pijme/article/view/275