The All-Day Kindergarten (ADK) Program was implemented in the Columbus (Ohio) Public Schools in January 1972 to provide a full day of instruction to prepare underachieving kindergarten pupils for first grade. The ADK is an individualized, language-based program that reinforces the skills, concepts, and educational experiences taught in the regular kindergarten classrooms. Starting in October 1990, the ADK was evaluated in terms of student gains in reading and oral comprehension skills and the participation of parents in their children's education. The evaluation was based on data from standardized achievement tests, pupil census logs, pupil data sheets and rosters, and parent involvement logs. It was found that the program served 646 pupils for an average of 14 hours of instruction a week. A total of 399 students attended at least 104.8 days or 80% of the entire instructional period. Over 75% of students with 80% or higher attendance levels gained 3.0 normal curve equivalent points or more in total reading and oral comprehension. Parents of 98.2% of the pupils participated in at least one program-related activity a year. Teachers had a positive response to their in-service training. Increased parent involvement, increased teacher in-service training, continued use of record-keeping documents, and continued school visitations were recommended. The appendixes contain the forms used for the evaluation. (AC)