One of 10 reports in a longitudinal study of Project Head Start submitted by NTS Research Corporation to the Administration for Children, Youth and Families, this document presents the individual testing battery used for the fall 1979 cohort. The first chapter identifies the skill areas to be tested in an analysis of Project Head Start's effectiveness in preparing children for school. Among these skill areas were appropriate developmental skills and readiness to acquire basic educational skills (such as reading, writing, and mathematics, as well as language, science, problem solving, and positive attitudes toward learning). The second chapter details the procedure for screening tests, including the criteria whereby tests were to be evaluated. A pilot test battery is presented in the third chapter: the tests in the pilot battery measured such areas as block building, verbal fluency, basic information, arm coordination, reading readiness, pictorial memory, and conceptual grouping. Also assessed by the pilot battery were verbal memory, leg coordination, number readiness, opposite analogies, "draw-a-child," and interpersonal problem solving. In the fourth chapter the test battery adopted for use with the fall 1979 cohort is presented; skills measured included many of the same skills already mentioned for the pilot test battery. Appendices include two papers about measuring preschool skills, a test review summary form, and the test batteries. (Author/DB)