A "student council" is a group of students who are chosen to represent and voice the opinions and interests of their fellow students in their school or educational institution. Full definition
«I'm not the kind of guy who ran for student council as a kid,» says the married father of three. (canadianbusiness.com)
First - through fifth - grade student council members are elected by their peers and organize community engagement projects throughout the year. (paceacademy.org)
Recently I was asked by a university's postdoc association and graduate student council to spend a day in individual meetings with their members. (sciencemag.org)