Introduction -- The benefits of collaborative analysis of student learning -- Why CASL works : the framework for teachers' reflective inquiry -- Culture building : norms and skills for collaborative inquiry -- Phases I and II : the target learning area, initial assessment, and focus students -- Phases III, IV, and V : study group analysis of student work, finding more information, final assessment, and reflection -- Facilitating CASL -- Leadership for CASL -- Conclusion -- Appendix A : session guides for facilitators -- Appendix B : directions for CASL portfolios.