“The Effectiveness of Using Problem-Based Learning-Based LKPD to Improve Students’ Mathematical Problem- Solving Skills”. ABDIMPACT: Journal of Community Service and Impact 1, no. 1 (March 14, 2026): 11–18. Accessed July 30, 2026. https://journal.uniqhba.ac.id/index.php/abdimpact/article/view/1147.