The Cognitively Oriented Prekindergarten Experience (Project COPE) is a preschool effort to accelerate the development of children from predominantly low-income families. This program was nationally validated as an ESEA Title III project and has received support from the U.S. Office of Education as a National Developer/Demonstrator site. Having recently completed its third year of operation, it is the objective of this paper to present three-year evaluation results of the program and to draw implications from these results as to the program's potential for meeting the needs of the disadvantaged child as well as preschool children in general. Statistical analysis of Pre-and posttest data showed substantial and significant gains on all measures of intellectual, language, and social development as well as on measures of reading and math achievement. (Author/RC)