Jumaroh, Juju, Aiman Faiz, and Arief Hidayat Afendi. “The Impact of the Hand Calculator Prism Model on Fourth-Grade Students’ Computational Abilities”. Journal of Innovation and Research in Primary Education 4, no. 4 (October 18, 2025): 3095–3107. Accessed January 21, 2026. https://ejournal.papanda.org/index.php/jirpe/article/view/2197.