NAMGYAL, Tenzin; KONGMANUS, Kobsook. 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 & Technology, [S. l.], v. 7, n. 4.38, p. 965–969, 2018. DOI: 10.14419/ijet.v7i4.38.27618. Disponível em: https://sciencepubco.com/index.php/ijet/article/view/27618.. Acesso em: 3 may. 2024.