The children in class two grade three are very happy, because they're going to be in grade four!

三年二班的学生非常高兴，因为他们要上四年级了。

youdao

I go to Simon English School. I'm in grade four class one.

我在西门英语学校读书，我在四年级一班。

youdao

I bought her two handwriting books about grade four yesterday.

昨天，我给她买了两本四年级的书法本。

youdao

Mr. MONTY NEILL (Co-Director, National Center for Fair and Open Testing): While scores have tended to go up on NAEP at grade four--and in math they went up fairly solidly for a while--they've now leveled out.

NPR: Mixed Report Card for U.S. Schools

One plan is to split the A grade into four sub-categories.

ECONOMIST: Exams

The average scores were categorized at each grade level into four groups: below basic, basic, proficient, and advanced.

CNN: Report card shows U.S. students need to improve math skills