Arias-Gago, Ana Rosa, and Alejandro Rodríguez-García. 2020. “Validation of the OCDUMA Scale to Analyze Teachers´ Conceptions, Opinions and Perceptions towards Active Methodologies”. Aula Abierta 49 (4):403-12. https://doi.org/10.17811/rifie.49.4.2020.403-412.