Through others we become ourselves.

The child begins to perceive the world not only through his [or her] eyes but also through his [or her] speech

It is through others that we become ourselves.

The true direction of the development of thinking is not from the individual to the social, but from the social to the individual.

Learning is more than the acquisition of the ability to think; it is the acquisition of many specialized abilities for thinking about a variety of things.

The distance between the actual developmental level as determined by independent problem solving and the level of potential development as determined through problem solving under adult guidance or in collaboration with more capable peers

The teacher must adopt the role of facilitator not content provider.