This report summarizes findings from the fourth School Nutrition Dietary Assessment Study, which collected data from nationally representative samples of school districts and schools in school year 2009-10. 

This report provides improper payment estimates for fiscal year 2011 using a methodology for “aging” the 2005 bookend study. The methodology yields nationally representative estimates of the number of vendors that over- and undercharged and the amount of over- and undercharges across all WIC vendors.