What children can do with the assistance of others might be in some sense even more indicative of their mental development than what they can do alone

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

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.

Language is the tool of the tools

What children can do with the assistance of others might be in some sense even more indicative of their mental development than what they can do alone

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

... People with great passions, people who accomplish great deeds, people who possess strong feelings, even people with great minds and a strong personality, rarely come out of good little boys and girls.