The only 'good' learning is that which is in advance of development.

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

Human learning presupposes a specific social nature and a process by which children grow into the intellectual life of those around them

Language is the tool of the tools

A child’s greatest achievements are possible in play, achievements that tomorrow will become her basic level of real action.

Any human act that gives rise to something new is referred to as a creative act, regardless of whether what is created is a physical object or some mental or emotional construct that lives within the person who created it and is known only to him.

Experience teaches us that thought does not express itself in words, but rather realizes itself in them