A pupil or student (usually referring to schoolchildren attending classes at elementary, junior high, or high schools).
生徒は教室で先生の話を静かに聞いている。
The students are quietly listening to the teacher in the classroom.
新学期が始まり、多くの生徒が登校した。
The new term started and many pupils went to school.
生徒会は文化祭の準備をしている。
The student council is preparing for the cultural festival.