From creating and repairing the first artifacts for personal and communal use through to the Internet of Things, the capacity of human beings to transform the world around them, for better or worse, continues to be shaped by their participation in social practices and learning, collectively and individually. Developing the expertise required to participate in work-related activities engages people in diverse forms of learning in a wide range of spaces throughout their lives. These spaces include workplaces, workshops, classrooms, community and domestic spaces (including forms of transport), and the natural environment, and increasingly through interaction with digital technologies, including the Internet. For some people, the expertise they deploy for what they term work (whether paid or unpaid) may be very different from the expertise they deploy in their leisure time, whereas for others there may be a close connection. Regardless of what drives an individual or a group of people to develop expertise, they will at some point participate in vocational education and training (VET). This participation will range across a wide spectrum: from programs providing an initial introduction for school pupils, to what is sometimes naively referred to as "the world of work, " through to bespoke training organized by or for employers and self-taught activity. In this way, VET embraces programs using work as their pretext, although treating it as a largely generic or abstract construct; programs that have a specific occupational focus and may lead to a license to practice; apprenticeships that combine education and training both in and away from the workplace; and work-based learning of various types and duration triggered by changes and innovation in work processes. As a result, the relationship between VET and actual work practice varies considerably. VET is a complex and challenging field of inquiry precisely because it cannot be easily defined.