Timbola, G. et al. 2023. Developing Differentiated Learning Devices to Heighten Student Learning Outcome on Light Concepts at SMP Negeri 1 Kwandang. Journal of Humanities and Social Sciences Studies. 5, 6 (Jun. 2023), 65–71. DOI:https://doi.org/10.32996/jhsss.2023.5.6.7.