This report presents the results of the National Assessment of Educational Progress (NAEP) long-term trend assessments in reading and mathematics administered during the 2011–12 school year to 9-, 13-, and 17-year-old students. Long-term trend assessments were first administered in the early 1970s; results are available for 12 reading assessments dating back to 1971 and 11 mathematics assessments dating back to 1973. This report provides trend results in terms of average scale scores, percentiles, and five performance levels. Item maps for each age group illustrate skills demonstrated by students when responding to assessment questions. Scale score results are included for students by selected background characteristics (e.g., race/ethnicity, gender, and type of school). Overall, the 2012 long-term trend results show 9- and 13-year-olds scoring higher in both reading and mathematics than students their age in the 1970s. At age 13, the overall average score in each subject was also higher in comparison to the last assessment in 2008. At age 17, however, the 2012 reading and mathematics average scores were not significantly different from those in the respective first assessment year.
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