Mr Andrews had accused UK Education Secretary Michael Gove of putting undue pressure on exam boards to make exams tougher.

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Teachers and head teachers say both schools and the exam boards are working under "intense pressure" .

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Despite the pressure on schools to improve their exam results, up to now there have been few confirmed cases of teacher-led cheating.

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Students receive constant pressure since elementary school and a failure at the university entrance exam means a failure to have a bright future.

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He believes that pressure on schools for top results is leading them to seek out exam boards that give the greatest number of top grades.

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