https://archive.org/details/cu31924013403666/page/n5/mode/2upWikipedia wrote:The Dalton Plan is an educational concept created by Helen Parkhurst. It is inspired by the intellectual ferment at the turn of the 20th century. Educational thinkers such as Maria Montessori and John Dewey influenced Parkhurst while she created the Dalton Plan. Their aim was to achieve a balance between a child's talent and the needs of the community.
https://en.wikipedia.org/wiki/Dalton_Plan
Not PD for Life+70