학생들을

students

→ 학생
phrase Rare #30,157
students 을 marks 학생들 as the object of the verb.
KO: 학생들을 만났어요.
EN: I met the students.

“선생님이 나이 든 학생들을 가르치는 동안 한 시간 쉬어도 된다고 하셨어요.”

The teacher said I could take an hour off while they taught the older students.