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2. Brooks, J. G. & Brooks, M. G. (1993). In search of understanding: The case for constructivist classrooms. Alexandria, VA: Association for Supervision and Curriculum Development.
3. Bruer, J. T. (1993). Schools for thought: A science of learning in the classroom. Cambridge, MA: MIT Press.
4. Caine, R. N. & Caine, G. C. (1991). Making connections: Teaching and the human brain. Alexandria, VA: Association for Supervision and Curriculum Development.
5. Costa, A. L. & Liebmann, R. M. (1997). Envisioning process as content: Toward a renaissance curriculum. Thousand Oaks, CA: Corwin Press.