BORBORAN, A., Africa , M. ., Guilleno , M.-A. ., Pamplona, A. J. C. ., Torrefranca , J. ., & Elipane , L. E. . (2021). Stimulating Understanding of Properties of Quadrilaterals Using Van Hiele’s Model: A Lesson Study. Journal of Mathematics and Statistics Studies, 2(1), 21–25. https://doi.org/10.32996/jmss.2021.2.1.3