This program evaluation of the 1967 summer Head Start Program examines data in these areas: (1) program functioning; (2) student gains and school readiness; (3) parent involvement; and (4) ancillary services. The report evaluates 720 classrooms which contained 23,000 children and utilized 51 supervisors, 260 head teachers, 728 group teachers, and 8,100 subprofessional staff. Methods of assessment included systematic observation, questionnaires, and interviews. Also used as sources of information were intelligence tests given to a subsample of the students, surveys of staff files, and Board of Education Head Start files and meetings with head staffs, supervisors, and parent groups. Many of the forms used for assessment are found in the appendixes. Results of the data indicate that the program was successful in achieving its stated aims. Conclusions are discussed and recommendations made in terms of administration and communication, staffing, equipment and space, program success rates, parent involvement, child progress and school readiness, and ancillary programs which include social, psychiatric, psychological, medical, and dental services. The durability of the results can be measured only in a followup study. (SDH)