The 4-H Study of Positive Youth Development is a longitudinal study that began in 2002 and was repeated annually for eight years, surveying more than 7,000 adolescents from diverse backgrounds across 42 U.S. states. The first wave of research began with fifth graders during the 2002-2003 school year and ended with twelfth graders (Wave eight) in 2010. More recently, the Tufts research team examined all eight waves of data and conducted new and more rigorous analyses in order to produce the latest comprehensive report of findings. The new report, while sometimes diverging from earlier results, provides powerful evidence of the impact of 4-H participation throughout Grades 5-12. (author abstract)