Setiyani, E.N., Panomram, W. and Wangdi, T. 2024. Development of Predict Observe Explain Based Flat Side Building Worksheets to Improve Students’ Mathematical Representation Skills. Interval: Indonesian Journal of Mathematical Education. 2, 1 (Jun. 2024), 15-21. DOI:https://doi.org/10.37251/ijome.v2i1.984.