1. Bass, H. (1998). Algebra with integrity and reality. Keynote Address at the NRC Symposium on the Nature and Role of Algebra in the K-14 Curriculum. Proceedings published by the NRC.
2. Brousseau, G. (1997). Foundations and methods of didactique. In N. Balacheff, M. Cooper, R. Sutherland, & V. Warfield (Eds. and Trans.). Theory of didactical situations in mathematics: Didactique des mathématiques, 1970–1990 (pp. 21–75). Dordrecht, The Netherlands: Kluwer.
3. Butterworth, B. (2015). Low numeracy: From brain to education. Plenary address at ICMI Study 23, Macau, China, June 2015.
4. Chislenko, E., & Tschinkel, Y. (2007). The Felix Klein protocols. Notices of the AMS, 54, 960–970.
5. Clements, D. H., & Stephan, M. (2001). Measurement in PreK-2 mathematics. In D. H. Clements, J. Sarama, & A.-M. DiBiase (Eds.), Engaging young children in mathematics. Reston: NCTM.