Finding the right English expression

[Irina Niculiu]

Is there an expression in English that refers to: "a child growing in one year like others of his age, let's say, in "3 years".

Thank you.
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Knowing is everything

[Alan]

Hi,

All I can think of is that you could say something like: He is (very) tall for his age.

Alan
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English as a Second Language
You can read my ESL story The way you write it