Helen Bradford Thompson (1847-1947), worked with Arnold Gesell, at the Gesell Institute of Human Development and Yale University--his research has provided fundamental knowledge about the behavior of children between birth and sixteen years of age. Gesell is best known for his theory that children learn best in environments that pay attention to their developmental growth. He had particular interest in alternative schooling practice, theorizing that because it is true that all children do not do the same things at the same age, schools should be organized by delvelopment stage not age groups.
From the guide to the Helen Thompson Papers, 1927-1942, (History of Medicine Division. National Library of Medicine)