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Top maths pupils 'fail to keep up with world's best'

22 February 2013 Last updated at 19:35 GMT

The ablest primary pupils in England almost match those in Taiwan and Hong Kong in maths but fall back by the time they are 16, a study suggests.

The top 10% of English secondary pupils also drop behind those in Australia, Scotland Slovenia and Norway, analysis of international test scores indicates.

Ministers said their reforms would "drive up standards."

Reeta Chakrabarti reports.