Maningo , Kent N., Porferio M. Almerino, Jr., and Lourdes M. Garciano. “Gauging the Educational Efficacy of Geometrical Manipulatives in Teaching the Curriculum Contents”. Cypriot Journal of Educational Sciences 16, no. 3 (June 30, 2021): 1279–1289. Accessed March 28, 2024. https://un-pub.eu/ojs/index.php/cjes/article/view/5849.