In his last period, Vygotsky continued to focus on the three dimensions he used in the previous periods: levels of activity, motivation and the inner versus the outer. The least developed of these at the end of the previous period, the inner versus the outer, remained in much the same form as before. The other two were subjected to fundamental revision in their content, but their overall form changed little and the way they interacted in development only moderately. There continued to be four levels of activity, each with four developmental steps along it: practice and tools; social relations; signs; selfconsciousness. Motivation continued to develop along ﬁve steps, one for infancy and four corresponding to the four steps in the levels. The inner and the outer developed along two steps only, as it was only formed at the start of the fourth stage of development, around 7 years.