Safinatunnaja, Eka Fitri Puspa Sari, and Imelda Ratih Ayu. “The Influence of Smart Ladder Learning Media on the Understanding of Mathematical Concepets in Addition and Subraction Material for Grade I Student”. Journal of Practice Learning and Educational Development 5, no. 3 (August 31, 2025): 1071–1077. Accessed November 9, 2026. https://digitalpress.gaes-edu.com/index.php/jpled/article/view/556.