At some point, the New York City Public School system began to operate summer recreation programs at various city parks and playgrounds. The 16 July 1921 New York Age announced the opening of such a program at the P.S. 89 playground, where Granddad Ralston was already coaching basketball. These programs included organized sports, phys. ed., and—surprise!—activities in the fine arts.
Granddad Ralston was named principal of the entire summer program at the playground, and, considering that he was not yet thirty years of age, this seems a signal recognition of his leadership abilities above and beyond his technical skills with Xs and Os as a basketball coach.