A model for a comprehensive, multi-purpose, multi-user evaluation system is presented to facilitate educational decision making and to support school improvement and renewal. The model is school district-based but oriented to meet state-, school-, and classroom-level needs as well. The model emphasizes the usefulness of common or compatible information bases to accomplish both the policy and accountability goals of district- and state-level decision makers and the planning needs of local educators. The comprehensive information system encompassed by the model includes information on student background, program participation, school context and processes, instructional processes, student test scores, student attitudes, and other outcomes. Products of the system include evaluation/participation reports to federal and state government agencies and to school boards; exploratory studies; special reports; and reports geared toward the level of the school, class, and individual students. The system model also includes an outline of system capabilities and analysis and reporting requirements. Discussion protocols for articulating the information needs of model users are appended. (TJH)