A process evaluation was conducted of the Saginaw, Michigan Public Schools' Prekindergarten Program. During the 1985-86 year, 454 children participated, based on their Prekindergarten Readiness Screening Device scores. The half-day program was funded through Chapter 1 of the Education Consolidation and Improvement Act to develop the school readiness skills of 4-year-olds. The Chapter 1 Prekindergarten Activity Observation Checklist was used to determine program implementation and to identify strengths and weaknesses which might influence program outcomes. Program supervisors conducted one observation, and two evaluators repeated it one month later. The checklist covered activities related to educational objectives, as well as parent role, development of language and self esteem, behavior modification, and learning center management. It was concluded that: (1) having two observations at each site was useful; and (2) the supervisor's feedback encouraged participants to follow guidelines. Additional expressive language activities and a teacher manual were recommended. (The objectives and the checklist are appended). (GDC)