Umiyati, Umiyati, Kartono Kartono, and Yumiati Yumiati. 2026. “Improving Problem-Solving Skills Through the Discovery Learning Model Assisted by Concrete Objects”. Edumaspul: Jurnal Pendidikan 10 (2):554-63. http://jurnal2.unimen.ac.id/index.php/edumaspul/article/view/292.