1. Ball, D. L. (2011). Foreword. In M. G. Sherin, V. R. Jacobs, & R. A. Philipp (Eds.), Mathematics teacher noticing: Seeing through teachers’ eyes (pp. xx–xxiv). New York: Routledge.
2. Ball, D. L., & Bass, H. (2003). Making mathematics reasonable in school. In J. Kilpatrick, W. G. Martin, & D. Schifter (Eds.), A research companion to principles and standards for school mathematics (pp. 27–44). Reston, VA: National Council of Teachers of Mathematics.
3. Brodie, K. (2010). Mathematical reasoning through tasks: Learners’ responses. In K. Brodie (Ed.), Teaching mathematical reasoning in secondary school classrooms (pp. 43–56). New York: Springer.
4. Bryman, A. (2012). Social research methods (4th ed.). New York: Oxford University Press.
5. Burns, M. (2005). Looking at how students reason. Educational Leadership, 63(3), 26–31.