Robert E. Reys is currently Professor of Math Education at the University of Missouri.  He received his B.S. in Education and his M.A. in Mathematics, both from Central Missouri State University.  He also received his Ed.D. in Mathematics Education from the University of Missouri.  Reys has been on the University of Missouri faculty since 1966. He has taught numerous undergraduate and graduate mathematics education courses and has served as advisor for more than 400 secondary mathematics majors, 100 MEd and 30 PhD students in mathematics education. Reys has also served as visiting professor at the University of Georgia, Fulbright Research/Lecturer in Mexico during 1989-90); University of Tsukuba (Japan; 1991-92) and a Fulbright Research/Lecturer in Sweden (1995). He was a visiting summer professor at the University of Saskatchewan (Canada) and the University of Regina (Canada). During the last ten years Reys has conducted workshops and seminars for teachers/researchers on mathematical topics from elementary to secondary school throughout the United States, and several countries including Australia, Canada, Cyprus, England, Germany, Hungary, Italy, Japan, Mexico, Panama, Philippines, Puerto Rico, Sweden, Taiwan and Yemen.