Al Mulhim, E.N. and Eldokhny, A.A. 2020. The Impact of Collaborative Group Size on Students’ Achievement and Product Quality in Project-Based Learning Environments. International Journal of Emerging Technologies in Learning (iJET). 15, 10 (Jun. 2020), pp. 157–174. DOI:https://doi.org/10.3991/ijet.v15i10.12913.