NAEP Instruments → Cognitive Items and Instruments → Development of the Long-Term Trend Cognitive Items and Instruments → Number of Long-Term Trend Mathematics Items, by Age: 2008

NAEP Technical DocumentationNumber of long-term trend mathematics items, by age: 2008

Age	Total
NOTE: The long-term trend assessment is analyzed using a single scale. The numbers in this table represent the post-scaling counts of items. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2008 Mathematics Long-Term Trend  Assessment.
9	135
13	156
17	156

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