Apprenticeship is work-based training toward your future career and begins with an agreement between the apprentice and the employer. The apprentice agrees to work for their employer in exchange for supervised, on the job training and experience, and the opportunity to participate in the technical training (in-class) that is a required part of the apprenticeship program. In the workplace, they will be supervised by a certified journeyperson, but it will be their responsibility to keep track of a logbook which will record both hours and competence in the practical skills of the trade. Youth apprentices are between the ages of 16 and 19, still attending high school. In-class technical training waits until after graduation, but they can continue to accumulate hours on the job, even working part time.