This is the 7040th most frequent Korean word.
절반은
"절반은" means "half of."
The word '절반은' is used here to specify 'half' as the subject of the sentence, indicating that out of all the students, only half completed the action of submitting homework.
학생들 중 절반은 숙제를 제출했습니다.
Half of the students submitted their homework.
In this sentence, '절반은' describes 'half' as the portion of the fruit box contents that specifically consists of apples.
내가 산 과일 상자의 절반은 사과로 채워져 있다.
Half of the fruit box I bought is filled with apples.
Here, '절반은' is used to quantify part of the group, explaining that half of the funders were private individuals.