Setiawan, Yohana, Keterina Marwa, Alfian Borom, and Yulianus Mamji. “The Efficacy of the ‘Pojok Ceria’ Interactive Bulletin Board in Enhancing Early Number Sense and Self-Directed Learning Among First-Grade Students”. Journal of Integrated Elementary Education 5, no. 2 (September 21, 2025): 506–526. Accessed November 3, 2025. https://journal.walisongo.ac.id/index.php/jieed/article/view/23895.