Apprenticeship is a time-honored approach to training skilled workers through a combination of on-the job training and classroom instruction. Each apprenticeship occupation has its own standard training outline which details the on-the-job training and classroom instruction required. Apprentices are full-time employees who produce high-quality work while they learn skills that enhance their employment prospects. An apprentice operates under the close supervision of a skilled worker on the job and takes related classroom instruction at night or on weekends. A graduated pay scale assures that salary reflects the degree of skill achieved.