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More to the point, the children/teenagers in question range from 13 to 18 years of age. I gather that "12th grade" is meaningless in much of the world.

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Thanks. It was kind of cute how the american terms were explained using more american terms.

Elsewhere it is posted when people begin school in the US. The rest is arithmetic.

> Elsewhere it is posted when people begin school in the US. The rest is arithmetic.

This is true, you know. Or are you saying only Americans can do arithmetic?

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