Examiners will struggle too, to produce a single test that measures the same level of ability in children of different ages. (In music tests all candidates for a given grade play the same pieces: in an English test, quite different reading texts and writing topics would suit an eight-year-old than an 11-year-old.) The changes might even have the perverse effect of making children sit more tests.

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He and two other siblings were fostered by three different families, and Mr Galili recalls with evident pain that he grew up in 17 different places between the ages of five and 18.

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The antique machines of different ages came together in a hurtling form, savage and beautiful and strange.

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The competition, which has been going strong since 1989 after being founded by noted inventor Dean Kamen, aims to inspire students of all ages to compete in different robotics challenges.

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But there were differences in the pattern for young people of different ages.

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"The amendment would in effect discriminate against people of different working ages without any objective policy for doing so, " he said.

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The study involved 5, 362 people between the ages of 45 and 84 living in six different cities that are part of the MESA AIR (Multi-Ethnic Study of Atherosclerosis and Air Pollution) research project, led by Joel Kaufman.

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It remains a solid play today, but it feels like a markedly different animal from the majestic beast that graced PCs back in ages past.

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When it comes to teaching, the productivity of a professor in the Middle Ages and that of a professor today are not very different.

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