This is the 4401st most frequent Korean word.
학교가
"학교가" means "the school is" in English.
Here, '학교가' functions as the subject followed by the subject marker '가', indicating that the school (subject) is being described as ending.
학교가 끝나면 우리는 운동장에 나가 놀아요.
After school ends, we go to the playground to play.
In this sentence, '학교가' specifies that the school is the subject being spoken of as being far away.
학교가 멀어서 걸어서 가기 힘들어요.
The school is far away, so it is difficult to walk there.
The phrase '학교가' identifies the specific subject (the school in question) being described as having been closed.