Setyadi, I.M.A., Sudiarta, I.G.P. and Mertasari, N.M.S. 2020. The effect of predict-observe-explain (POE) learning model using open-ended problem (OEP) towards students’ mathematical problem solving skill. Jurnal Pendidikan dan Pengajaran. 52, 3 (Jan. 2020), 133–144. DOI:https://doi.org/10.23887/jpp.v52i3.15713.