1. (1963). Thepsychology of meaningful learning. New York: Grune & Stratton.
2. The role of algorithms in teaching problem solving
3. , , & (1985). Improving thinking and learning skills: An analysis of three approaches. In , & (Eds.), Thinking and learning skills. Volume 1: Relating instruction to research. Hillsdale, NJ: Lawrence Erlbaum, pp. 133–206.