Cindri Madelta and Muhammad Putra Dinata Saragi 2026. Development of Interactive Flipbook Game Media Based on Cheerful Twin Cards to Train the Memory of Students at SMP Negeri 17 Medan. International Journal of Education, Vocational and Social Science . 5, 03 (Aug. 2026), 8084-8108. DOI:https://doi.org/10.63922/ijevss.v5i03.5996.