This final report of the Early Childhood Demonstration Program for the Disadvantaged, begun in October 1969 at the Learning Research Center of West Chester State College, West Chester, Pennsylvania, contains the evaluative results of 80 children enrolled since 1969. The aim of this compensatory program was to develop an infant education curriculum with a strong cognitive emphasis, but based in the initial building of a firm foundation of sensory-perceptual abilities as a prerequisite step. The early childhood intervention program attempted to reconstruct an environment of educationally disadvantaged children which educationally incapacitated them before they entered school. This attempt was significant in that it tried to start such compensatory training in a structured manner at ages younger than generally thought practical. Covered in this report are: (1) a review of related research; (2) the rationale of the program; (3) program activities; and, (4) an evaluation, including subjective and objective results as well as conclusions. (Author/SB)