Wulandari, D., & Fajar, D. M. (2022). DEVELOPMENT OF ANDROID-BASED EDUCATIONAL GAMES, LIGHT MATERIALS, AND OPTICAL TOOLS FOR CLASS VIII SMP/MTS. JPPIPA (Jurnal Penelitian Pendidikan IPA), 7(2), 72–80. https://doi.org/10.26740/jppipa.v7n2.p72-80