1. Akey, T. M. (2006). School context, student attitudes and behavior, and academic achievement: An exploratory analysis. New York: MDRC.
2. Alexander, K. L., Entwisle, D. R., & Dauber, S. L. (2003). On the success of failure: A reassessment of the effects of retention in the primary grades. Cambridge: Cambridge University Press.
3. Ali, K., Basley, J., Flores, Q., Goud, L., Jackson, M. K., Jones, I., & Thomas, R. (2010). Freshmen on-track: A guide to help you keep your freshmen on-track to graduate. Chicago: Chicago Public Schools, Department of Graduation Pathways. http://www.chooseyourfuture.org/sites/default/files/fot-freshmen-on-track-handbook.pdf .
4. Allensworth, E. M. (2013). The use of ninth-grade early warning indicators to improve Chicago schools. Journal of Education for Students Placed at Risk, 18(1), 68–83. doi:10.1080/10824669.2013.745181.
5. Allensworth, E. M., & Easton, J. Q. (2005). The on-track indicator as a predictor of high school graduation. Chicago: University of Chicago Consortium on Chicago School Research.