Andreas Schleicher: Use data to build better schools | Video on TED.com »

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How can we measure what makes a school system work? Andreas Schleicher walks us through the PISA test, a global measurement that ranks countries against one another -- then uses that same data to help schools improve. Watch to find out where your country stacks up, and learn the single factor that makes some systems outperform others. Source Main page (current trends)

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