 Longer follow-up measurements are needed to determine if CTC can significantly reduce community levels of delinquency and drug use as hypothesized.The Community Youth Development Study will collect additional data from these students in 2007 and 2008.These data will allow tests of CTC's effects on community rates of delinquency and substance use initiation among young people through the spring of grade 9, almost 5 years after CTC was introduced in the intervention communities and approximately years after communities began implementing tested and effective prevention programs chosen through the CTC system.