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NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Scales → Number of Items in Each Subject Area Scale → Number of Items in the Mathematics Scale as Defined Before and After Scaling, by Age, Mathematics Long-Term Trend Assessment: 2004

NAEP Technical DocumentationNumber of items in scales as defined before scaling, by age, mathematics long-term trend assessment: 2004

Age	Mathematics long-term trend
9	140
13	166
17	162
NOTE: A single scale is used in NAEP long-term trend assessments; no subscales are created. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2004 Mathematics Long-Term Trend Assessment.

Number of items in scales as defined after scaling, by age, mathematics long-term trend assessment: 2004

Age	Mathematics long-term trend
9	140
13	166
17	162
NOTE: A single scale is used in NAEP long-term trend assessments; no subscales are created. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2004 Mathematics Long-Term Trend Assessment.

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