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Wouldn't that make Grade 12 18 ~ 19 years of age? Has the school age been moved up a year? I vaguely remember the oldest kids in high school being 18.

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If you turn 15 in 9th grade, you will turn 18 in 12th grade.

Don't know if parent has been edited to correct something, but:

9: 14-15

10: 15-16

11: 16-17

12: 17-18

Ah that's right. I should have just written in out rather than just adding 4.

At the end of your freshmen year, you have 3 years until the send of your senior year. See, Algebra is useful for something.

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