Beginning in the 1980s, Michigan began making investments in fully preparing young children for school--cognitively, physically, socially and emotionally. Currently Michigan's Great Start system encompasses both early childhood services and a strategic plan for the state's early childhood system of programs, services, and supports for children from birth to age five and their families. One element of that system, the Great Start Readiness Program (GSRP), in concert with federally-funded Head Start programs, serves over 47,000 low-income four-year-olds annually through either a half-day or full-day program of educational preparation. Economists and economic development officials agree that any strategies to enhance the long-term growth of Michigan must include maintaining and upgrading the quality of its workforce. Yet some recent Michigan data raise the discomfiting prospect that the educational attainment of the state's workforce may decline as retiring workers are replaced by the young people who are currently finishing or (in too many cases) not finishing school. This study estimates the current cost savings and revenues to Michigan generated from the investments in school readiness over the past 25 years, the cost burden to Michigan when children are not fully-prepared at kindergarten entry, and the additional benefits that could be realized if Michigan were to expand its investment in school readiness to all educationally disadvantaged children. [For the full report, see ED511595.]