Pennapa Chaisirithawonkun และ Montri Thongmoon. (2023) The Effects of Organizing Mathematics Learning Activities Based on Heuristics and Higher Order Questions on Mathematics Problem Solving Ability of Matthayomsuksa 5 Students. <i>Journal of Science and Science Education</i>, <i>6</i>(1), 50-62.Pennapa Chaisirithawonkun และ Montri Thongmoon. "The Effects of Organizing Mathematics Learning Activities Based on Heuristics and Higher Order Questions on Mathematics Problem Solving Ability of Matthayomsuksa 5 Students". Journal of Science and Science Education 6 (2023):50-62.Pennapa Chaisirithawonkun และ Montri Thongmoon. The Effects of Organizing Mathematics Learning Activities Based on Heuristics and Higher Order Questions on Mathematics Problem Solving Ability of Matthayomsuksa 5 Students. Faculty of Science, Ubon Ratchathani University:ม.ป.ท. 2023.