And the children were 50% more likely to speak English as an additional language and 35% more likely to have be summer born.

BBC: Poorest pupils 'weaker at maths'

But the NUT said candidates who needed several resits to pass the tests were dyslexic, had English as an additional language, or were less familiar with the on-line testing system.

BBC: Literacy and numeracy tests toughened for new teachers

By then, the company expects to have launched a new version of its software as well as another product to take the company into an additional market (language).

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The Pan European Game Information system (Pegi) gives games an age rating as well as additional information such as violent content and bad language.

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