Chernbumroong, S., Thongthip, P., Puritat, K., Jansukpum, K. and Julrode, P. 2023. The effect of pre-class online video on improving knowledge retention and motivation. World Journal on Educational Technology: Current Issues. 15, 1 (Jan. 2023), 28–42. DOI:https://doi.org/10.18844/wjet.v15i1.7806.