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

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

Grade	Scale	A	B
1 Univariate scale. NOTE: Transformed scale scores below 0 were reset to values of 0, and any transformed scale scores greater than 300 were set to values of 300. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Science Assessment.
4	One scale1	36.80	149.66
8	One scale1	37.18	149.18
12	One scale1	37.40	149.19

Coefficients of linear transformations of the univariate scales from the calibrating scale units to the units of the reporting scale, science combined national and state main assessment, by grade: 2009

Grade	Scale	A	B
NOTE: Transformed scale scores below 0 were reset to values of 0, and any transformed scale scores greater than 300 were set to values of 300. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Science Assessment.
4	Physical science	37.69	149.64
	Earth and space	35.17	150.40
	Life science	35.36	150.22
8	Physical science	36.32	149.50
	Earth and space	37.03	149.25
	Life science	36.78	149.21
12	Physical science	35.53	149.88
	Earth and space	35.75	149.61
	Life science	37.76	148.95

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