Mawardah, R.; Zuliana, E.; Sumaji, S.; Thamae, L. C. Development, Validity, and Effectiveness of an Ethnomathematics-Based Learning Medium Using Menara Kudus to Improve Fifth-Grade Students’ Understanding of Quadrilateral Area. EJES 2026, 2 (2), 90-98. https://doi.org/10.65820/ejes-7vol2-issue2-2026.