WASHINGTON (AP) — Results from a global exam given to 15-year-olds show U.S. students lagging in math and just average in science and reading, while teens from Asian nations dominate the categories.

Education Secretary Arne (AHR'-nee) Duncan calls the results released today a "picture of educational stagnation."

Students from all states were tested. But for the first time, three states, Massachusetts, Connecticut and Florida, opted to increase participation in PISA to get more state specific results.

Average scores from Massachusetts were above the international average in all three subject areas. Connecticut's students scored on average around the international average in math and higher than the international average in science and reading.

U.S. students overall showed little improvement and failed to reach the top 20 in any of the three categories.

The top average scores in each subject came from Shanghai, China. Singapore, South Korea, Japan, and Hong Kong were among the participants with students scoring at the top on average in each subject.