NAEP Analysis and Scaling → Scale Linking and Transformation to the Reporting Metric → Transformation Constants for NAEP Assessments → Coefficients of Linear Transformations of the Content-Strand Scales from the Calibrating Scale Units to the Units of the Reporting Scale, Mathematics Combined National and State Main Assessment, by Scale and Grade: 2009

NAEP Technical DocumentationCoefficients of linear transformations of the content-strand scales from the calibrating scale units to the units of the reporting scale, mathematics combined national and state main assessment, by scale and grade: 2009

Grade	Scale	A	B
1 Measurement and Geometry were combined for grade twelve in 2009. NOTE: Transformed scale scores below 0 were reset to values of 0, and any transformed scale scores greater than 500 were set to values of 500. 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	Numbers properties and operations	32.31	238.09
	Measurement	33.30	239.24
	Geometry	25.02	239.04
	Data analysis and probability	28.28	244.01
	Algebra	25.85	244.95
8	Numbers properties and operations	36.22	279.93
	Measurement	45.31	280.30
	Geometry	33.23	279.18
	Data analysis and probability	40.03	285.67
	Algebra	35.91	286.91
121	Numbers properties and operations	37.36	149.47
	Measurement & Geometry	34.92	152.41
	Data analysis and probability	35.88	151.89
	Algebra	35.30	153.29

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