involved new Rasch models, estimation methods, fit statistics, or data applications. Wright's former students include leaders in psychometrics in academic, commercial, and governmental positions globally, such as Wan Rani Abdullah, Raymond Adams, David Andrich, Betty Bergstrom, Nikolaus Bezruczko, Brian Bontempo, William Boone, Ong Kim Lee, Sunhee Chae, Chih-Hung Chang, Bruce H. Choppin, Yi Du, Graham Douglas, George Engelhard, Jr., Patrick B. Fisher, William P. Fisher, Jr., Richard Gershon, Dorothea Juul, George Karabatsos, Ross Lambert, John M. Linacre, Larry Ludlow, Geofferey Masters, Ronald Mead, Robert Mislevy, Mark Moulton, Carol Myford, Nargis Panchapakesan, Wendy Rheault, Matthew Schulz, Richard M. Smith, John Stahl, Douglas Stone, Gregory Stone, Donna Surges Tatum, Herbert Walberg, Mark Wilson, Lih Mei Yang, and many others. Among Wright's students, Bruce H. Choppin stands out as an early and influential advocate of Rasch measurement. Choppin died unexpectedly in Chile in 1983. The International Association for the Evaluation of Educational Achievement has conferred the IEA Bruce H. Choppin Memorial Award on new researchers doing innovative work in education-related areas since 1985. Colleagues influenced by Wright include Pedro Alvarez, Trevor Bond, Abraham Bookstein, David Cella, Anne G. Fisher, Christine Fox, Carl Granger, Kathy Green, Richard F. Harvey, Allen Heinemann, Ellen Julian, Elena Kardanova, Rense Lange, Alain Leplege, Mary Lunz, Anatoli Maslak, Robert Massof, Magdalena Mok, Fred Shaw, Kenneth Royal, Everett V. Smith, A. Jackson Stenner, Mark Stone, Alan Tennant, Luigi Tesio, Richard Woodcock, Weimo Zhu, and many others. List of major events 1964: Visit to Rasch in Denmark. Intensive study with Rasch. Rasch's student, Gus Leunbach, took Wright through his Rasch model computer programs. 1965: CALFIT software written with Bruce H. Choppin and Nargis Panchapakesan, both also former physicists. CALFIT was rewritten about 1974 by Ronald Mead, a student of Wright's, with the assistance of Chris Wright, Wright's son. About the same time the name was changed to BICAL when the binomial model was added. Wright kept the software in continuous quality improvement mode until 1989, when he assumed a supervisory role and the details of software design and development were taken up by John M. Linacre. Began annual courses on Rasch measurement in U of Chicago Departments of Education and Psychology. Gave presentation on Rasch models to Midwestern Educational Research Association annual meeting. 1967: At the invitation of Benjamin Bloom, Wright presented Rasch analysis of Law School Admissions Test data at Educational Testing Service. 1969: Released new unconditional estimation algorithm and