The Harvard School of Public Health Harvard Prevention Research Center records, 1992-2003 (inclusive), 1994-2003 (bulk), are the product of research projects and educational interventions developed and implemented by the HPRC under the direction of Steven L. Gortmaker, particularly the Planet Health curriculum and Play Across Boston. The records are arranged in two series: I. Planet Health Records (1992-1997); and II. Play Across Boston Records (2000-2003).