1. Abu-Hilal, M. (2000). A structural model for predicting mathematics achievement: Its relation with anxiety and self-concept in mathematics. Psychological Reports, 86, 835-847.
2. Ames, C. (1992). Classrooms, goals, structures, and student motivation. Journal of Educational Psychology, 84, 261-271.
3. Ball, D. L. & Cohen, D. K. (1996). Reform by the book: What is - or might be - the role of curriculum materials in teacher learning and instructional reform. Educational Researcher, 25(9), 6-8.
4. Ball, D., Roskam, A., Morris, A., Hiebert, J., Suzuka, K., Lewis, J., et al. (2009). Improving mathematics teaching and teacher education through “specification”. Paper presented at the National Council of Teachers of Mathematics Research Precession, Washington DC, April, 21, 2009.
5. Barab, S. & Squire, K. (2004). Design-based research: Putting a stake in the ground. The Journal of the Learning Sciences, 13(1), 1-14.