In the Boy Scouts of America, a Scout leader refers to the trained leaders (men or women) of a Scout unit. Adult leaders are generally referred to as "Scouters," and the youth leaders are referred to by their position within a unit (i.e. Den Chief, Patrol Leader, Boatswain). In all Scouting units above the Cub Scout pack and units serving adolescent Scouts, leadership of the unit comprises both adult leaders (Scouters) and youth leaders (Scouts). This is a key part of the Aims and Methods of Scouting. In order to learn leadership, the youth must actually serve in leadership roles.