An index of student patterns of item response, when aggregated to the class level, was shown to identify classes that have a poor match between test content and instructional coverage. The mean caution index for a class can best be interpreted knowing the within-class standard deviation of the index. (Author/LMO)

Data from the Second International Mathematics Study for 3,724 eighth graders are used to demonstrate the potential of multilevel factor analysis (MFA) methodology. Issues related to between-class and within-class decomposition of achievement variance and the change in this decomposition over the course of the eighth grade are revealed through…