Leonardo virtually announced the birth of the method of modern science when he said that true knowledge begins with opinion. - John Dewey

The only way to prepare for social life is to engage in social life. To form habits of social usefulness and serviceableness apart from any direct social need and motive, apart from any existing social situation, is, to the letter, teaching the child to swim by going through motions outside of the water.

Expertness of taste is at once the result and reward of constant exercise of thinking.

Just because traditional education was a matter of routine in which the plans and programs were handed down from the past, it does not follow that progressive education is a matter of planless improvisation.