Examined the impact of a bi-generational mathematics intervention with Head Start families in two studies. Found that intervention children developed more extensive mathematical knowledge than a comparison group of low-income children. Low-income parents were willing and able to support the children's mathematical development once trained to do…

Investigated factors that played a role in mediating the effects of the government-funded Child-Parent Center preschool program in Chicago. Results indicated that preschool influenced later achievement and retention indirectly rather than directly. A social context view of the transmission of preschool effects was supported. (LB)