It is with children that we have the best chance of studying the development of logical knowledge, mathematical knowledge, physical knowledge, and so forth.

Every acquisition of accommodation becomes material for assimilation, but assimilation always resists new accommodations.

The more we try to improve our schools, the heavier the teaching task becomes; and the better our teaching methods the more difficult they are to apply.

Each time one prematurely teaches a child something he could have discovered himself, that child is kept from inventing it and consequently from understanding it completely.

To express the same idea in still another way, I think that human knowledge is essentially active.

Teaching means creating situations where structures can be discovered.

Intelligence is what you use when you don't know what to do.