Lehrer, R., Catley, K., and Reiser, B. (2004). Tracing a trajectory for developing understanding of evolution. Invited paper for the National Research Council Committee on Test Design for K-12 Science Achievement. Available: http://www7.nationalacademies.org/bota/Evolution.pdf.
National Research Council. (2007). Learning progressions. Chapter 8 in Committee on Science Learning, Kindergarten Through Eighth Grade, Taking science to school: Learning and teaching science in grades K-8 (pp. 211-250). R.A. Duschl, H.A. Schweingruber, and A.W. Shouse (Eds.). Center for Education, Division of Behavioral and Social Sciences and Education. Washington, DC: The National Academies Press.
Schmidt, W., Wang, H., and McKnight, C. (2005). Curriculum coherence: An examination of U.S. mathematics and science content standards from an international perspective. Journal of Curriculum Studies, 37, 525-559.
Smith, C., Wiser, M., Anderson, C.A., Krajick, J., and Coppola, B. (2004). Implications of research on children’s learning for assessment: Matter and atomic molecular theory. Paper commissioned by the National Academies Committee on Test Design for K-12 Science Achievement. Available: http://www7.nationalacademies.org/bota/Big%20Idea%20Team_%20AMT.pdf.