Haryadi, Rudi, Heni Pujiastuti, and Hanifa Nuraini Al Kansaa. 2022. “The Effect of the Development of Physics Teaching Materials in Improving Student Concept Understanding”. Edumaspul: Jurnal Pendidikan 6 (1), 891-94. https://doi.org/10.33487/edumaspul.v6i1.3329.