Cognition, from this per-spective, cannot be explained by computationalmodels of structures and processes ‘in the head’;rather, one must look to the intact activity systemsin which the individual participates. Such systemsalways necessarily include social relationships,physical and temporal contexts, symbolic and ma-terial resources (such as tools), and historicalchange. From this perspective, cognition is ‘a com-plex social phenomenon ... distributed – stretchedover, not divided among – mind, body, activity,and culturally organized settings (which includeother actors)’ (Lave, 1988, p. 1). The structuresof interest, then, are the interactional structures ofsuch social and material systems, not structures inthe individual mind.
This complexity of multiple systems incorporated through relationships, contexts, resources, and change build these structures within and amongst each other where as this is how they grow and intertwine within differents contexts, allowing them to branch amongst multiple venues for growth and exploration, affecting multiple layers.