Colón Ortiz, L. C., and J. Ortiz-Vega. “Effect of the Use of the Problem Based Learning Teaching Strategy in the Development of Comprehension Skills and Analysis of Descriptive Statistics”. Iberoamerican Journal of Educational Evaluation, vol. 13, no. 1, Apr. 2020, pp. 205-23, doi:10.15366/riee2020.13.1.009.