US students lag behind Asian peers in 2 popular subjects

Eighth-grade students in the U.S. showed improvement in math over the past four years, but scores for science fell flat.

In fourth grade, scores for both subjects went unchanged, according to new test results.

An international exam shows U.S. students trail many peers in Asia. It's called the "Trends in International Mathematics and Science Study," or simply, "TIMSS."

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The TIMSS exams are given every four years worldwide. In 2015, nearly 600,000 students took the exam.

Singapore performed best, taking first place for grades in math and science among fourth and eighth-graders.

The U.S. was 10th place in fourth-grade science and in eighth-grade math. Fourth-grade math scores landed the U.S. in 14th place.

Despite the ranking, the exam results were positive.

Scores in both subjects and in both grade levels have risen since TIMSS was first given in 1995.