Are open educational resources (OER) and practices (OEP) effective in improving learning achievement? A meta analysis and research synthesisTilli, A., Garzon, J., Salha, S., Huang, R., Xu, L., Burgos, D., Denden, M., Farrel, O., Farrow, R., Bozkurt, A., Amiel, T., McGreal, R., Lopez-Serrano, A., & Wiley, D. (2023). Are open educational resources (OER) and practices (OEP) effective in improving learning achievement? A meta analysis and research synthesis. International Journal of Educational Technology in Higher Education, 20(54) 1-24. https://doi.org/10.1186/s41239-023-00424-3
