Fred Paas is professor of Educational Psychology at Erasmus University Rotterdam. He holds a master's degree (1988) in human movement sciences and a Ph.D. degree (1993) in instructional technology. His research and teaching focuses on the design of effective and efficient learning environments by applying contemporary, multidisciplinary scientific knowledge about the human cognitive system. He has published more than 300 articles and book chapters, which have accrued over 40.000 citations. He is editor-in-chief of the journal Educational Psychology Review, and on the editorial board of the Journal of Educational Psychology, and the International Journal of Environmental Research and Public Health.