Information from several historical sources provides a clearer understanding of the Thayer Conference, including little-known background information. Changes in school psychology since the conference are described through comparisons of the field at the time of the conference and at present. Major recommendations and expectations emanating from the Thayer Conference are reviewed against subsequent developments in the field. Most of the recommendations for the future of the field have been accomplished. Those in favor of two levels of training, credentialing, and service provision continue to divide school psychology and work against its organizational unification and parity with other specialties.