González-Velasco, Carmen, Isabel Feito-Ruiz, Marcos González-Fernández, José-Luis Álvarez-Arenal, and Nicolás Sarmiento-Alonso. “Does the teaching-learning model based on the flipped classroom improve academic results of students at different educational levels?”. Revista Complutense de Educación, vol. 32, vol. 32, no. 1, 2021, pp. 27-39, doi: https://doi.org/10.5209/rced.67851.