the 1998 Mathematics Framework for California Public Schools and in 2006 was appointed to the President's National Mathematics Advisory Panel. While serving on the panel, he chaired the learning processes task group. In 2007, he was appointed by President George W. Bush to the National Board of Directors, Institute of Education Sciences (IES), and served through 2010. He is also co-author of Developing effective fractions instruction for kindergarten through 8th grade: A practice guide and an on-line overview of learning disabilities in mathematics for parents and teachers. Personal life Geary is married to Yin Xia, an applied economist. He also has a son named Nick. Research Geary's research interests are centered on his four books, Children's mathematical development (1994), Male, female (1998, 2010, second edition), Origin of mind (2005), and Evolution of vulnerability (2015); the latter was discussed in an interview with the Guardian. He is also co-author of the 2008 Sex differences: Summarizing more than a century of scientific research, and co-editor with Drs. Berch and Mann Koepke of a five-volume series on mathematical cognition and learning. His research on mathematical development ranged from mathematical modeling of adults’ processing of arithmetic problems; the effects of aging on these processes; and cross national and cross generational differences in mathematical abilities. In this area, he is best known for his research on learning difficulties in mathematics and in 1993 published a theoretical and review article that outlined subtypes of disabilities and helped to organize subsequent research in this area. He currently directs the Missouri Longitudinal Study of Mathematical Learning and Disability. Geary's research in evolutionary psychology also ranges across a variety of issues, from evolution of the hominid brain to men's hormonal responses while competing against members of their in-group or against an out-group. He has also written extensively on human paternal investment (fatherhood) and the evolution of the human family, and is one of the pioneers in evolutionary developmental psychology and evolutionary educational psychology. His collaborators include former students, Drew H. Bailey and Benjamin Winegard with research focused in social signaling, among other topics. Selected works Geary has authored or co-authored and published over 200 articles in academic journals. His h-index according to Google Scholar is 54. Books Others Geary, D. C. (2005). Folk knowledge and academic learning. In B. J. Ellis & D. F. Bjorklund (Eds.), Origins of the social mind. (pp. 493–519). New York: Guilford Publications. Full text