@article{Phuphasit_Prasertsang_2020, title={Developing Problem Solving Skills in Mathematics of Grade 4 Student by Using Constructivist Theory}, volume={14}, url={http://so03.tci-thaijo.org/index.php/reru/article/view/239140}, abstractNote={<p>The purpose of this research was to develop mathematical problem-solving skills of grade 4 students who were taught with lessons based on the constructivist theory with a criterion of 70 percent. The target sample group included 11 grade 4 students enrolled in the second semester of the academic year 2019 at Bannariang School, Sai Mun District, Yasothon Province. The target sample group was obtained through purposive sampling. The instruments for data collection were a learning management plan based on the constructivist theory for mathematical problem-solving skill development, a learning activity record form, a student learning behavior observation form, and a mathematical problem-solving skill test (a subjective test with 5 items). Statistics for data analysis were percentage, mean, and standard deviation. The results of the research showed that at the end of the learning process, the studentsâ€™ average score from the mathematical problem-solving skill development was 19.81 (79.27%). Among the target sample group, 8 students passed the preset criterion of 70 percent (72.72%).</p>}, number={3}, journal={Journal of Roi Et Rajabhat University}, author={Phuphasit, Katchariya and Prasertsang, Parichart}, year={2020}, month={Dec.}, pages={141-148} }