Anggraeni, Dwi Astuti, Abdul Hakim, and Nurul Fitriyah Sulaeman. 2023. “Problem-Solving Ability through Flipped-Problem Based Learning on Elasticity Materials for High School Student”. Kasuari: Physics Education Journal (KPEJ) 6 (1):1-10. https://doi.org/10.37891/kpej.v6i1.367.