NOTE: Achievement levels are performance standards showing what students should know and be able to do. Basic denotes partial mastery of knowledge and skills that are fundamental for Proficient work at a given grade. (Below Basic, therefore, denotes less than this level of achievement.) Proficient represents solid academic performance. Students reaching this level have demonstrated competency over challenging subject matter. Advanced signifies superior performance. NAEP reports data on student race/ethnicity based on information obtained from school rosters. Race categories exclude persons of Hispanic ethnicity. Detail may not sum to totals because of rounding.
SOURCE: U.S. Department of Education, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Mathematics Assessment, NAEP Data Explorer.