Hung-Hsi Wu is a professor emeritus of mathematics at the University of California, Berkeley. He served on the National Mathematics Advisory Panel and has written extensively on mathematics curriculum, textbooks, and teacher preparation. Since 2000, he has conducted professional development institutes for elementary and middle school teachers. He was worked extensively with the state of California in mathematics education, and was a member of the Mathematics Steering Committee that contributed to revising the National Assessment of Educational Progress Framework. In recent years, he has focused on writing textbooks for the professional development of K-12 mathematics teachers.