Nov202009
New research by Brian Jacob shows NCLB has mixed effects on student achievement
Bob Brustman @ 11:00 am

Brian Jacob
Brian Jacob, Walter H. Annenberg Professor of Education Policy, professor of education, professor of public policy, and professor of economics, has co-authored a thorough evaluation of the No Child Left Behind (NCLB) Act, The Impact of No Child Left Behind on Student Achievement. With co-author Thomas Dee of Swarthmore College, Jacob’s research finds that NCLB reforms generated statistically significant increases in the average math performance of 4th graders as well as improvements at the lower and top achievement percentiles. There was also evidence of improvements in 8th grade math achievement, particularly among traditionally low-achieving groups and at the lower percentiles. However, the authors find no evidence that NCLB increased reading achievement in either 4th or 8th grade.
Jacob and Dee also looked at NCLB’s effects by race, gender, and free-lunch eligibility and found only modest impacts among disadvantaged subgroups in math, therefore making minimal progress towards closing achievement gaps.
“The prior evidence on the achievement effects is quite limited. Earlier studies have either focused on single districts or states, relied on state developed assessments that are subject to ’score inflation’, or used weak research designs that confound the impact of NCLB with other social, educational and economic factors, “said Jacob. “We believe this new research sheds much-needed light on the results of what was arguably the most far-reaching education policy initiative of the last forty years.”
The reearch is published as a National Bureau of Economics Working Paper. The U-M Gerald R. Ford School of Public Policy issued a press release and Education Week posted an article on its website.







