Hutapea, Pinondang. 2022. “The Effect Of The Cooperative Learning Learning Model Using Flash Media And Motivation On Student Achievement In Gas Kinetic Theory Material At High School State 2 Medan Y.S. 2021/2022”. Jurnal Pendidikan Indonesia 1 (01):19-29. https://doi.org/10.58471/ju-pendi.v1i01.248.