squad leader; group leader; team leader
Refers to the leader of a small organized group (班), such as a class group, work team, or military squad. Common in school and workplace settings.
I was chosen as the group leader at school.
As the team leader, I coordinate the members' opinions.
This week, Tanaka became the group leader.
He served as the leader of the cleaning squad for three years.
She was chosen as the group leader at the class meeting.
As the group leader, he pulled everyone's opinions together.