Elgin Johnston earned his doctorate at the University of Illinois (Urbana) in complex analysis and approximation theory. In recent years he has been interested in the role of writing and technology in teaching mathematics. He recently authored a calculus text with Jerry Mathews, and had written several student projects for technology enhanced calculus.
Johnston has also had a long interest in recreational problem solving. He has been very active on the Committee on American Mathematics Competitions. For six years he chaired the committee charged with writing the American Invitational Mathematics Exam, and is serving a three year term as Chair of the MAA Committee on American Mathematics Competitions. He is also Problems Editor for
Mathematics Magazine.