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Garner, B.K. (2008). When students seem stalled:  The missing link for too many kids who don’t “get it?” cognitive structures.  Educational Leadership 65(6), 32-38.

Hamachek, D. (1979). Psychology in teaching, learning and growth. Boston: Allyn and Bacon.

Piaget, J. (1954).  The origins of intelligence in children, New York: Oxford University Press.

Siegler, R. S., & Alibali, M. W. (1986). Children's Thinking. United States of America: Prentice Hall.

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