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Namgyal, T. and Kongmanus, K. 2018. Effectiveness of a Mathematics Instructional Package on Pólya’s Steps Including Video Clips to Enhance Problem Solving Abilities of 6th Grade Students in Bhutan.
International Journal of Engineering and Technology. 7, 4.38 (Dec. 2018), 965–969
. DOI:https://doi.org/10.14419/ijet.v7i4.38.27618.