Oktaviani, M. ., Dwihapsari, K., Islami, M. N., Dewi, N. P., Fadhilah, R. N., & Palupi, Z. D. (2023). Cognitive Development of Elementary School Children in Developing Critical Thinking Ability and Understanding Mathematical Concepts. International Education Trend Issues, 1(2), 134 - 142. https://doi.org/10.56442/ieti.v1i3.178