Studied the advantages and disadvantages of using multilevel models and the statistical program MLwiN in analyzing large-scale educational data with repeated measures. Used data from Finnish eighth graders in 1991 (n=1,123) and 1995 (n=1,113) to study the quality of school life over time. Results show the usefulness of the multilevel statistical analysis and demonstrate changes in general school satisfaction and teacher-student relations. (SLD)