NAEP Analysis and Scaling → Estimation of NAEP Score Scales → NAEP Scales → Number of Items in Each Subject Area Scale → Number of Items in Scales as Defined Before and After Scaling, Mathematics Combined National and State Assessments, by Grade: 2009

NAEP Technical DocumentationNumber of Items in Scales as Defined Before and After Scaling, Mathematics Combined National and State Assessments, by Grade: 2009

Number of items in scales as defined before scaling, mathematics combined national and state main assessment, by grade: 2009

Grade	Total	Number sense, properties, and operations scale	Measurement scale	Geometry scale	Data analysis, statistics, and probability scale	Algebra scale
1 At grade 12, the Measurement and Geometry and spatial sense subscales were combined for scaling. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Mathematics Assessment.
4	159	60	32	25	19	23
8	159	30	28	33	22	46
121	344	50	111		74	109

Number of items in scales as defined after scaling, mathematics combined national and state main assessment, by grade: 2009

Grade	Total	Number sense, properties, and operations scale	Measurement scale	Geometry scale	Data analysis, statistics, and probability scale	Algebra scale
1 At grade 12, the Measurement and Geometry and spatial sense subscales were combined for scaling. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Mathematics Assessment.
4	159	60	32	25	19	23
8	159	30	28	33	22	46
121	343	50	110		74	109

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