When a teacher adjusts the support offered to a child to fit the child's current level of performance and to help her reach the zone of proximal development, the teacher is:

The concept of 'private speech' of children as proposed by Vygotsky:

According to Vygotsky, learning cannot be separated from:

Lev Vygotsky referred to the difference between what a child can do on his own and what can be accomplished with some assistance as: