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Rolf V. Olsen & Sigrid Blömeke In an earlier blog, we established that international large-scale assessments can be regarded as powerful and influential knowledge sources for making claims about the quality of educational systems. Comparisons between countries have over time...

Andrés Sandoval-Hernández The Programme for International Student Assessment (PISA) is a survey of the educational performance of 15-year-old students organised by the Organisation for Economic Co-operation and Development (OECD). The results of the latest round of PISA will be released...

Marc Piopiunik The OECD’s Programme for International Student Assessment (PISA) continually illustrates how the reading, science and mathematics performance of 15-year-olds differs across countries. Differences in teacher quality are commonly cited as a key determinant of these huge differences. In...