1. Abeysekera, L., & Dawson, P. (2015). Motivation and cognitive load in the flipped classroom: Definition, rationale and a call for research. Higher Education Research & Development, 34(1), 1–14.
2. Amador, J. A., & Gorres, J. H. (2004). A problem-based learning approach to teaching introductory soil science. Journal of Natural Resources and Life Sciences Education, 33, 21–27.
3. Baran, M., & Sozbilir, M. (2017). An application of context-and problem-based learning (C-PBL) into teaching thermodynamics. Research in Science Education, 1–27.
4. Barrows, H. S. (1996). Problem-based learning in medicine and beyond: A brief overview. In L. Wilkerson & W. H. Gijselaers (Eds.), Bring problem-based learning to higher education: Theory and practice (pp. 3–12). San Francisco: Jossey-Bass.
5. Barrows, H. S., & Myers, A. C. (1993). Problem-based learning in secondary schools [unpublished monograph]. Springfield: Problem-Based Learning Institute, Lanphier High School, and Southern Illinois University Medical School.