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Ten Year Adolescent Math Study 
News and PublicationsNewsDr. Geary serves on the National Mathematics Advisory Panel. Final Report Released March 13, 2008. Video summary available. Learn more. Project Summary for Teachers, Principals, and other Educational Professionals Fall 2010 [in pdf] Article about Mathematical Disabilities for Parents and TeachersMathematical Disabilities: What We Know and Don't Know by David C. Geary More detailed articles and chapters on Mathemematics and Learning DisablitiesGeary, D. C. (2013). Early foundations for mathematics learning and their relations to learning Geary, D.C., Hoard, M. K., Nugent, L., & Bailey, H. D. (2013). Adolescents’ functional numeracy is predicted by their school entry number system knowledge. PLoS ONE, 8(1): e54651. doi:10.1371/journal.pone.0054651
Geary, D. C. (2013). Learning disabilities in mathematics: Recent advances. In H. L. Swanson, K. Harris, & S. Graham (Eds.), Handbook of learning disabilities (second edition) (pp. 239255). New York: Guilford Press. Chu, F., vanMarle, K., & Geary, D. C. (2013). Quantitative deficits of preschool children at risk for mathematical learning disability. Frontiers in Developmental Psychology, 4,195. doi: 10.3389/fpsyg.2013.00195
Geary, D. C., Hoard, M. K., Nugent, L., & Bailey, D. H. (2012). Mathematical cognition deficits in children with learning disabilities and persistent low achievement: A five year prospective study. Journal of Educational Psychology, 104, 206–223.
Geary, D. C., Hoard, M. K., & Bailey, D. H. (2012). Fact retrieval deficits in low achieving children and children with mathematical learning disability. Journal of Learning Disabilities, 45, 291307.
Cho, S., Metcalfe, A. W. S., Young, C. B., Ryali, S. Geary, D. C., & Menon, V. (2012). Hippocampalprefrontal engagement and dynamic causal interactions in the maturation of children’s fact retrieval. Journal of Cognitive Neuroscience, 24, 1849–1866.
Bailey, D. H., Littlefield, A., & Geary, D. C. (2012). The codevelopment of skill at and preference for use of retrievalbased processes for solving addition problems: Individual and sex differences from first to sixth grade. Journal of Experimental Child Psychology, 113, 7892.
Bailey, D. H., Hoard, M. K., Nugent, L., & Geary, D.C. (2012). Competence with fractions predicts gains in mathematics achievement. Journal of Experimental Child Psychology, 113, 447455.
Geary, D.C., Hoard, M. K., & Nugent, L. (2012). Independent contributions of the central executive, intelligence, and inclass attentive behavior to developmental change in the strategies used to solve addition problems.Journal of Experimental Child Psychology, 113, 4965.
Geary, D. C. (2011). Cognitive predictors of individual differences in achievement growth in mathematics: A five year longitudinal study. Developmental Psychology, 47, 15391552.
Geary, D. C. (2011). Consequences, characteristics, and causes of poor mathematics achievement and mathematical learning disabilities. Journal of Developmental and Behavioral Pediatrics, 32, 250263.
Geary, D. C., Hoard, M. K., & Bailey, D. H. (2011). How SLD manifests in mathematics. In Flanagan, D. P., & Alfonso, V. C. (Eds.), Essentials of Specific Learning Disability Identification (pp. 4364). Hoboken, NJ: Wiley. Cho, S., Ryali, S., Geary, D. C., & Menon, V. (2011). How do you solve 7+8?: Decoding children's brain activity patterns during counting versus retrieval. Developmental Science, 14, 9891001.
Geary, D. C., Berch, D. B., Boykin, A. W., Embretson, S., Reyna, V., & Siegler, R. S. (2011). Learning mathematics: Findings from the national (United States) mathematics advisory panel. In N. Canto (Ed.), Issues and proposals in mathematics education (pp. 175221). Lisbon, Portugal: Gulbenkian. Geary, D. C. (2010). Missouri longitudinal study of mathematical development and disability. British Journal of Educational Psychology Monograph Series II, 7, 3149. In R. Cowan, M. Saxton, & A. Tolmie (Eds.), Understanding number development and number difficulties (No. 7, British Journal of Educational Psychology, Monograph Series II: Psychological Aspects of Education  Current Trends). Leicester, UK: British Psychological Society.
Geary, D. C. (2010). Mathematical learning disabilities. In J. Holmes (Ed.), Advances in Child Development and Behavior (Vol. 38, pp. 4577). San Diego, CA: Academic Press. Geary, D. C. (2010). Mathematical disabilities: Reflections on cognitive, neuropsychological, and genetic components. Learning and Individual Differences, 20, 130133.
Meyer, M. L., Salimpoor, V. N., Wu, S. S., Geary, D. C., & Menon V. (2010) Differential contribution of specific working memory components to mathematical skills in 2nd and 3rd graders. Learning and Individual Differences, 20, 101109.
Geary, D. C., Bailey, D. H., Littlefield, A., Wood, P., Hoard, M. K., & Nugent, L. (2009). Firstgrade predictors of mathematical learning disability: A latent class trajectory analysis. Cognitive Development, 34, 411429.
Geary, D. C., Bailey, D. H., & Hoard, M. K. (2009). Predicting mathematical achievement and mathematical learning disability with a simple screening tool: The Number Sets Test. Journal of Psychoeducational Assessment, 27, 265279.
Geary, D. C., Hoard, M. K., Nugent, L., & ByrdCraven, J. (2008). Development of number line representations in children with mathematical learning disability. Developmental Neuropsychology, 33(3), 277299.
Wu, S., S., Meyer, M. L., Maeda, U., Salimpoor, V., Tomiyama, S., Geary, D. C., & Menon, V. (2008). Standardized assessment of strategy use and working memory in early mental arithmetic performance. Developmental Neuropsychology, 33(3), 365393.
Hoard, M. K., Geary, D. C., ByrdCraven, J., & Nugent, L. (2008). Mathematical cognition in intellectually precocious first graders. Developmental Neuropsychology, 3:33, 251276.
Geary, D. C., Hoard, M. K., ByrdCraven, J., Nugent, L., & Numtee, C. (2007). Cognitive mechanisms underlying achievement deficits in children with mathematical learning disability. Child Development, 78, 13431359.
Geary, D. C. (2007). An evolutionary perspective on learning disability in mathematics. Developmental Neuropsychology, 32, 149.
Geary, D. C. (2004). Mathematics and learning disabilities. Journal of Learning Disabilities, 37, 415.
Geary, D. C., Hoard, M. K., ByrdCraven, J., & DeSoto, M. C. (2004). Strategy choices in simple and complex addition: Contributions of working memory and counting knowledge for children with mathematical disability. Journal of Experimental Child Psychology, 88, 121151.
Geary, D. C. (2003). Learning disabilities in arithmetic: Problem solving differences and cognitive deficits. In H. L. Swanson, K. Harris, & S. Graham (Eds.), Handbook of learning disabilities (pp. 199212). New York: Guilford Press.

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