1. Anderson, J. R. (1980). Cognitive psychology and its implications. San Francisco: Freeman.
2. Anderson, J. R. (1982). Acquisition of cognitive skill. Psychological Review, 89, 369–406. doi: 10.1037/0033-295X.89.4.369 .
3. Anderson, J. R., Reder, L. M., & Simon, H. A. (1996). Situated learning and education. Educational Researcher, 25(4), 5–11.
4. Ball, D. L., & Bass, H. (2000). Interweaving content and pedagogy in teaching and learning to teach: Knowing and using mathematics. In J. Boaler (Ed.), Multiple Perspectives on Mathematics Teaching and Learning, 83–104.
5. Behr, M., Erlwanger, S., & Nichols, E. (1976). How children view equality sentences: PMDC technical report, no. 3. Tallahassee, Fla.: Florida State University, 1975. ERIC No. ED, 144, 802.