摘要：The article presents a research program in education, which is developed within an enactive perspective and focuses on human activity. More specii cally, activity is conceptualized as dynamic, meaningful for the actor, giving rise to experience and autonomous. The analysis of actual activity in working and training situations highlights phenomena of simplexity, which are summarized in three points: transparency and appropriation, mimesis, and typicalisation. As a conclusion, the article points out some avenues taking seriously these phenomena of simplexity for designing professional learning environments.
