Quote from - Dynamic Assessment

Vygotsky’s research into the development of cognitive functions revealed that this process is not a matter of innate abilities growing into a mature state but that it is the emergence of new ways of thinking, acting, and being that result from an individual’s engagement in activities where he or she is supported by cultural artifacts and by interactions with others. In this way, the social environment is not merely the stage on which development plays out, it is in fact the driving force of development.