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A standardized test score for secondary education, adjusted for comparability over time, across subjects, and across international and regional assessments. The dataset provides adjusted scores approximated to 5-year intervals from 1965 to 2010. It was created by Education Statistics using data from assessments like PISA, TIMSS, and the U.S. NAEP.
The exact license, file format, and data structure (specific columns, row count) are unknown. The adjustment methodology is complex and should be reviewed before analysis.