1. , , , & (1989). Biology: The living world. Englewood Cliffs, NJ: Prentice-Hall.
2. American Association for the Advancement of Science. (1989). Project 2061: Science for all Americans. Washington, DC: Author.
3. Some Reflections on the Acquisition of Knowledge
4. Knowledge Gro;Baxter,1985
5. (1987). Ways of thinking about students and classrooms by more and less experienced teachers. In (Ed.), Exploring teachers' thinking (pp. 60–83). London: Cassell.