The system of apprenticeship first developed in the later Middle Ages and came to be supervised by craft guilds and town governments. A master craftsman was entitled to employ young people as an inexpensive form of labour in exchange for providing food, lodging and formal training in the craft. Apprentices usually began at ten to fifteen years of age, and would live in the master craftsman's household. Most apprentices aspired to becoming master craftsmen themselves on completion of their contract (usually a term of seven years), but some would spend time as a journeyman and a significant proportion would never acquire their own workshop. Wikipedia
It's time to think about how career preparation in many fields could involve new forms of apprenticeship. This becomes especially more viable when as never before mentors and learners have technologies that make recording, archiving, accessing and sharing of any learning more possible.