It Is Necessary. It Is Montessori.

"It is necessary to give children the possibility of developing according to the laws of their nature, so that they can become strong, and, having become strong, can do even more than we dared hope for them." 

"A room in which all children move about usefully, intelligently, and voluntarily, without committing any rough or rude act, would seem to me a classroom very well disciplined indeed."  -- Maria Montessori