* The NAEP writing assessment was not administered to fourth graders in 2011. Percentages for each grade may not sum to 100 due to rounding.
Source: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, The Nation's Report Card: Writing 2011: National Assessment of Educational Progress at Grades 8 and 12, NCES 2012-470 (Washington, DC: U.S. Department of Education, 2012), 10 fig. 1, 28 fig. 17, http://nces.ed.gov/nationsreportcard/pdf/main2011/2012470.pdf.