John Sweller earned his Ph.D. in 1972, and has been lecturing and researching for 39 years. He has been Emeritus Professor of Education at the University of New South Wales in Sydney, Australia, since 2006. His research reputation is associated with cognitive load theory, on which he began work in the early 1980s. He has authored and/or edited several special issues of various journals, and his research has been cited in academic articles, books and journals on over 6,000 occasions, with a rapidly increasing citation rate. He has graduated more than 40 doctoral students. He continues to collaborate on cognitive load theory with many individuals and groups.