When to use grade in Korean
Korean: 급[ geup ]

When to use it
급 means a grade or level. It is often used with a number, like 1급 or 2급, to show how high or low a class, test, or skill level is. In school and study situations, it helps people talk about course levels, exam levels, or certificates.
Example sentences
저는 한국어 2급 반에 있어요.
I am in the level 2 Korean class.
선생님, 이 책은 몇 급이에요?
Teacher, what grade level is this book?
언니는 집에서 3급 시험을 공부해요.
My older sister studies at home for the level 3 test.
서점에 1급 문제집이 있어요.
There is a level 1 workbook at the bookstore.
우리는 학교에서 초급 수업을 들어요.
We take a beginner-level class at school.
친구는 다음 달에 2급 자격증 시험을 봐요.
My friend takes the level 2 certificate test next month.