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How old were you in second grade? About 10 right? Maybe 9 approaching 10. Close enough that your argument is ignorant and terrible.

in most places, 9-10 is fourth grade?

So I guess 2 years makes ALL the difference in this context.

Each year makes a large difference for kids yes.

> So I guess 2 years makes ALL the difference in this context.

Well, yeah.

The difference between a 3yo and a 4yo is a quarter of lifetime!

The difference between an 8yo and a 10yo is a fifth of a lifetime!