In this age of accountability, afterschool programs are increasingly held responsible for providing youth with quality care and education. Afterschool programs play a critical role in helping youth develop their intrapersonal and interpersonal skills, often by engaging them in activities in which they interact with their peers. Such activities require afterschool program staff to carefully supervise children and youth in order to manage risk and ensure the young people's safety. Relationship building and mentoring are also part of such supervision. The "supervision" we explore in this article is the watchful guidance provided by staff members to program participants rather than the mentoring a senior staff member provides to a less experienced youth worker. This article explores the "best practices" of this kind of supervision in afterschool programs, outlining programs' responsibilities and suggesting practical supervisory techniques. A framework of supervision for small- and large-group activities outlines the responsibilities and duties of supervisors and can help afterschool programs develop their own supervision plans.