This study intends to decompose apprenticeships. First, based on an extensive review of existing literature, it proposes a formal definition of apprenticeships that differentiates this type of training modality from other types of skills training. Second, it explores core elements and principles in depth that are central to apprenticeship programs —both in terms of their design and delivery— and presents examples of best practices from around the world that LAC countries can use as potential instruments to apply within their contexts.