My brother is in Class Three, Grade Nine.

我哥哥在九年级三班。

youdao

All the students from Grade Nine are having an important exam.

所有九年级的学生都有一场重要的考试。

youdao

I read it in grade nine.

我在9年级的时候读过这个故事。

youdao

In eighth-grade math, nine of the 10 districts equaled or surpassed the average national improvement of seven points only Cleveland didn't.

WSJ: City Schools Gain in Reading, Math

In 1997, 42, 000 nine-year-olds failed the Texas test, yet more than 38, 000 of them advanced to the next grade.

ECONOMIST: Education