May 1, 1918 Helena Devereux and her students took residence in the house that became known as “Devereux Stone.” Soon her students numbered 12, and in 1919 Devereux was able to purchase the rental property, as well as the neighboring estate. Over the course of two years, school enrollment doubled. In 1920 Devereux purchased another property in Berwyn, Pennsylvania in order to provide a home to some of the younger developmentally disabled children in her care. From 1920 onward, the organization saw continued growth, both in enrollment numbers, as well as in properties purchased.