Programs that use the workplace as a learning environment to develop students' competencies in technical areas and related mathematics, science, communication, and problem solving. Students learn by doing in the workplace with the help of mentors. In some programs, qualified students receive recognized occupational credentials when they complete the programs. Registered apprenticeships combine supervised, structured on-the-job training with related theoretical instruction that is sponsored by employers or labor and management groups that have the ability to hire and train in a work environment.