Sobariah, Isti, Andi Suhandi, and Wahyu Sopandi. 2020. “Conceptual Changes of Fifth Graders towards Water Properties Concept in Mixed Materials through The Implementation of Predict-Observe-Explain Strategy Assisted by Science Kits”. International Conference on Elementary Education 2 (1). Bandung, Indonesia, 866-78. http://proceedings.upi.edu/index.php/icee/article/view/698.