García-Segura, Sonia, Ernesto Rey-Sánchez, and Carmen Gil-Del-Pino. 2019. “The Portfolio As an Innovative Didactic Proposal in Primary Education Classrooms”. Praxis Educativa 23 (2):1-14. https://doi.org/10.19137/https://dx.doi.org/10.19137/praxiseducativa-2019-230207.