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Lee, Jaekyung; Fish, Reva M. – American Journal of Education, 2010
Merging National Assessment of Educational Progress and Trends in International Math and Science Study math data, this study examines the extent and sources of variation in value-added academic growth patterns among different nations and U.S. states. Applying hierarchical linear models with an instrumental variable method, the study disentangles…
Descriptors: Mathematics Achievement, Achievement Gains, National Competency Tests, Mathematics Tests