Low-income males in Chicago who attended the High/Scope preschool had such long-lasting benefits from the program that for every $1 spent on the program, society saved $4 because as adults, the men avoided incarceration and paid income taxes.
Step-by-step explanation:
Kids have developmental needs distinct from pre-school children and therefore early steps take different forms according to the age of their child. This study explores the facts of the effects of various interventions in early childhood between these different age groups.
The High / Scope Perry Preschool research offered preschool in Ypsilanti, Michigan in the 1960s for low-income African-Americans with high risk of failure.
The fact that Perry has been evaluated using randomised trials that produce highly credible results as well as because the data about his participants has been collected routinely over many other evaluations on any given subject, is one of the more common pre-school interventions, in part, because it was evaluated at 39-41 years of age (Schweinhart, Barnes, and Weikart 1993).