Beane, J. (Ed.) (1995). Toward a Coherent Curriculum: 1995 Yearbook of the Association for Supervision and Curriculum Development. Alexandria, VA: ASCD.

Bloom, B. (1956). Taxonomy of Educational Objectives. New York: D. McKay.

Checkley, K. (September 1997). "The First Seven . . . and the Eighth: A Conversation with Howard Gardner." Educational Leadership 55:1, 8-13.

Gardner, H., (1993). Multiple Intelligences: The Theory in Practice. New York: Basic Books.

Gardner, H. (1999). Intelligence Reframed: Multiple Intelligences for the 21st Century. New York: Basic Books.

Glover, J. and Bruning, R. (1987). Educational Psychology: Principles and Applications, 2d Ed. Boston: Little, Brown and Company.

McBrien, J.L. and Brandt R. (1997). The Language of Learning: A Guide to Education Terms. Alexandria, VA: Association for Supervision and Curriculum Development.

North American Association for Environmental Education. (1996). Environmental Education Materials: Guidelines for Excellence. Rock Spring, GA: NAAEE

UNESCO-UNEP (1976). The Belgrade Chater. Connect: UNESCO-UNEP Environmental Education Newsletter, Vol. 1 (1) pp. 1-2.

UNESCO (1978). Final Report Intergovernmental Conference on Environmental Education. Organized by UNESCO in Cooperation with UNEP, Tbilisi, USSR, 14-26 October 1997, Paris: UNESCO ED/MD/49.

Wiggins, G. and McTighe, J. (1998). Understanding by Design. Alexandria, VA: Association for Supervision and Curriculum Development.