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Schmidt, William H.; Burroughs, Nathan A. – Research in Comparative and International Education, 2013
In this article, the authors review International Large-Scale Assessment (ILSA)-based research over the last several decades, with specific attention on cross-national analysis of mean differences between and variation within countries in mathematics education. They discuss the role of sampling design and "opportunity to learn" (OTL)…
Descriptors: International Programs, Measurement, Educational Research, Cross Cultural Studies

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