The world ' s largest international study of 15-year-old adolescents revealed a worrying decline in the results of science, mathematics and reading.
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The world ' s largest international study of 15-year-old adolescents revealed a worrying decline in the results of science, mathematics and reading.

The world ' s largest international study of 15-year-old adolescents revealed a worrying decline in the results of science, mathematics and reading.