León-León, G. and Zúñiga-Meléndez, A.trans. 2019. Pedagogical Mediation and Scientific Knowledge Using a Sample of Ninth Grade Science Teachers in Two School Districts of the Costa Rica Educational System for the Development of Scientific Competencies. Revista Electrónica Educare. 23, 2 (Apr. 2019), 1–24. DOI:https://doi.org/10.15359/ree.23-2.5.