What are the types of developed Open Educational Resources, and the duration of their implementation?

The study findings can help various stakeholders (e.g., educators, instructional designers or policy makers) in understanding what might hinder OER and OEP effect on learning achievement, hence accommodating better learning outcomes and more effective interventions. Tlili, A., Garzón, J., Salha, S. et al. Are open educational resources (OER) and practices (OEP) effective in improving learning achievement? A meta-analysis and research synthesis. Int J Educ Technol High Educ 20, 54 (2023). https://doi.org/10.1186/s41239-023-00424-3