EDSTATS: Average Adjusted Primary Test Score — every country, all years (World Bank)

A test score that has been standardized over time, across subjects, and across various international and regional assessments taken at the primary school level. It is calculated by creating a ratio between U.S. primary scores averaged across subjects on all international tests (such as PISA and TIMSS) to average primary scores averaged across subjects on the U.S. National Assessment of Educational Progress (NAEP) approximated to the nearest 5-year time step from 1965-2010. All raw international primary scores are averaged across subjects and approximated to the nearest 5-year interval, averaged across tests, and then multiplied by this ratio. This makes these adjusted scores comparable over time, across countries and across international tests. Primary test scores from countries which only participate in regional assessments are included in the above transformation after being averaged a Every country, region and year the World Bank publishes for indicator AED.PRIM.MEAN (Education Statistics), delivered as a tidy table — country, ISO code, year and value — ready for analysis in Excel, R, Python or the Intigal AI workspace. Original compiler: Angrist, N., Patrinos, H. and Schlotter, M.. The World Bank (2013).

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World Bank Open Data