1. Beaton, A. E., Mullis, I. V., Martin, M. O., Gonzalez, E. J., Kelly, D. L., & Smith, T. A. (1996). Mathematics achievement in the middle school years: IEA’s Third International Mathematics and Science Study. Chestnut Hill, MA: Center for the Study of Testing, Evaluation, and Educational Policy, Boston College.
2. Beaton, A. E. (2001). An index to measure within school tracking. In progress.
3. Bryk, A. S., & Raudenbush, S. W. (1992). Hierarchical linear models: Applications and data analysis methods. Newbury Park, CA: Sage
4. Bryk, A. S., Raudenbush, S. W., & Congdon, R. (1996). Hierarchical linear and nonlinear modeling with the HLM/2 and HLM/3 programs. Chicago: Scientific Software International, Inc.
5. Coleman, J. S., Campbell, E., Hobson, C., McPartland, J., Mood, A. M., Weinfeld, F., & York, R. (1966). Equality of educational opportunity. Washington, DC: U. S. Government Printing Office.