Potential of Global Tests Seen as Unrealized

Scholars urged to scour TIMSS, PISA for policy insights.

In 1958, a group of international scholars met in Hamburg, Germany, and hatched an idea for a huge study to measure student learning around the globe.

They saw the world as one big educational laboratory, with each country acting as its own naturally occurring experiment. If tests could gauge the effects of those experiments, the researchers reasoned, the results might yield a bonanza on how best to teach children.

Nearly 50 years later, the project they had in mind is called the Trends in International Mathematics and Science Study, or TIMSS—one of the biggest and most influential assessment programs in the world. Yet it still hasn’t delivered on its early promise, say experts who attended a conference here this month aimed at rekindling the original vision...

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