Leonard Porter Ayres (1879-1946) was an American educator, who received his college and graduate training at Boston, Harvard, and Columbia universities. He began teaching in 1902 as one of the first to carry American ideas and methods to Puerto Rico. There he was appointed superintendent of schools in the districts of Caguas and San Juan, and later general superintendent of all the public schools on the island. Having returned to live in the United States, he was made head of the division of statistics in the Playground Association of America. Beginning in 1908, he was prominently identified with the work of the Russell Sage Foundation, especially as chairman of the committee in charge of the Backward Children Investigation. In 1908-1909 he lectured on education at New York University. His works include: A Course of Study for the Schools of San Juan (1905), Medical Inspection of Schools, with Luther H. Gulick (1908), Laggards in our Schools (1909), Open Air Schools (1910), Seven Great Foundations (1911), Health Work in the Public Schools, with May Ayres (1915) and A Measuring Scale for Ability in Spelling (1915). Это и многое другое вы найдете в книге Health Work in the Public Schools (Illustrated Edition) (Dodo Press) (Leonard P. Ayres)