The theoretical framework of Vygotsky entails specific understandings
of learning, development, and the goal(s) of development. In Vygotsky'
s usage, the term obuchenie, frequently translated as 'learning'. more
accurately indicates the interaction of teacher and student. Although
the various domains (phylogenesis, sociocultural history ontogenesis,
and microgenesis) to which Vygotsky extended the concept of developme
nt have differing dynamics, the course of development within each doma
in is characterized by the transformative effects of cultural tools (m
ediational means) upon their users. Vygotsky posited a form of abstrac
t rationality associated with decontextualization, a semiotic potentia
l inherent in all human languages, as an ideal endpoint (telos) of dev
elopment. Evidence that Vygotsky at times assumed the existence of ano
ther telos, corresponding to the semiotic potential of contextualizati
on, has implications for a potential developmental account of heteroge
neity in human mental functioning.