U.S. students are doing no better on an international science exam than they were a decade ago, a plateau in performance that leaves educators and policymakers worried about how schools are preparing students to compete in an increasingly global economy.

Results of the Trends in International Mathematics and Science Study (TIMSS), released today, show how fourth- and eighth-graders in the United States measure up to peers in dozens of countries. U.S. students showed gains in math at both grades. But average science performance, although still stronger than in many countries, has stagnated since 1995.

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