A feasibility plan is presented for a California comprehensive student information study that would identify factors affecting students' progress through California's entire educational system. The feasibility plan identifies: (1) potential improvements, (2) the study design required to achieve them, (3) the cost of implementing the design, including savings resulting from reduced duplication of effort, (4) a schedule for implementing the study, and (5) conclusions and recommendations for further state and segmental initiatives for improving student information for public educational policy planning. Included is an overview of study objectives, related research questions, and required data elements. For 30 student characteristics, 6 institutional characteristics, and 6 community characteristics, a chart indicates the educational entity that currently has the data elements needed for the comprehensive study. The text of California Assembly Bill 880 is appended, along with a consultant's report on the cost of implementing a uniform student identification system. Also appended is a background paper on the feasibility plan that includes information on study objectives, existing student databases, new data elements, and alternative mechanisms for collecting and reporting information. (SW)