He received his Ph. D in mathematics education from Florida State University. As a native of Japan, Tad was always interested in mathematics education practices in his home country. He spent seven months in Japan during the summer and fall of 2000 and attended more than 15 lesson study open houses and school-based lesson study meetings. He has published several articles on Japanese elementary school math curriculum and lesson study. His article "Learning from Japanese Lesson Study" appeared in the March 2002 issue of Educational Leadership. Tad has collaborated with lesson study groups in Rochester, NY, Volusia County, FL, and at Paterson Public School No. 2 in Paterson, NJ.