The seventh report of the Michigan Educational Assessment Program provides data comparing scores on the program variables of groups of State school districts classified on the basis of enrollment size. The 628 districts were divided into 14 groups, which were compared on: (1) human resources--such as pupil/teacher ratio and percent of teachers with master's degree; (2) school financial resources--such as local revenue per pupil and State school aid per pupil; (3) student background; (4) school/student performance--Attitude measures, basic skills measures, and dropout rate; and (5) school or district size. Qualifying information regarding the use of the data is given, and statistical terms are defined. It was found that on certain assessment measures in the categories of school resources, student background, and dropout rate, groups of school districts classified according to enrollment size do perform differently. But differences were found to be slight on most measures. No discernible pattern occurred in the basic skills measures. An appendix lists the school districts in the size groupings used for the study. (For related documents, see EM 002 327-330.) (KM)