This explanatory report was prepared to assist educators in the interpretation of the local district and school summary reports provided by the 1974-75 Michigan Educational Assessment Program. Information concerning the interpretation of student and classroom reports was provided in a separate report. The first section of this report describes the educational assessment measures used in the 1974-75 program. The second section contains aids for interpreting the information contained in the reports and includes facsimilies of the forms used to report assessment results to local school districts. The final section contains cautions that should be exercised in the interpretation of the school and school district reports. Appendix A contains a listing of the mathematics and reading performance objectives for grades four and seven assessed in the 1974-75 program; Appendix B contains the definitions of the educational assessment measures. (Author)