TY - JOUR AU - Dee,Thomas AU - Jacob,Brian TI - The Impact of No Child Left Behind on Student Achievement JF - National Bureau of Economic Research Working Paper Series VL - No. 15531 PY - 2009 Y2 - November 2009 UR - http://www.nber.org/papers/w15531 L1 - http://www.nber.org/papers/w15531.pdf N1 - Author contact info: Thomas Dee Stanford University 520 Galvez Mall, CERAS Building, 5th Floor Stanford, CA 94305-3084 Tel: (650) 736-1258 Fax: (650) 723-9931 E-Mail: tdee@stanford.edu Brian Jacob Gerald R. Ford School of Public Policy University of Michigan 735 South State Street Ann Arbor, MI 48109 Tel: 734-615-6994 Fax: NA E-Mail: bajacob@umich.edu AB - The No Child Left Behind (NCLB) Act compelled states to design school-accountability systems based on annual student assessments. The effect of this Federal legislation on the distribution of student achievement is a highly controversial but centrally important question. This study presents evidence on whether NCLB has influenced student achievement based on an analysis of state-level panel data on student test scores from the National Assessment of Educational Progress (NAEP). The impact of NCLB is identified using a comparative interrupted time series analysis that relies on comparisons of the test-score changes across states that already had school-accountability policies in place prior to NCLB and those that did not. Our results indicate that NCLB generated statistically significant increases in the average math performance of 4th graders (effect size = 0.22 by 2007) as well as improvements at the lower and top percentiles. There is also evidence of improvements in 8th grade math achievement, particularly among traditionally low-achieving groups and at the lower percentiles. However, we find no evidence that NCLB increased reading achievement in either 4th or 8th grade. ER -