1. American Association for the Advancement of Science (AAAS). (1993). Benchmarks for Science Literacy, Washington, DC: AAAS. Available online at http://www.project2061.org/tools/benchol/bolframe.htm (Project 2061 web site).
2. Bloom, B.S., Englehart, M.D., Furst, E.J., Hill, W.H., and Krathwohl, D.R. (1956). A Taxonomy of Educational Objectives: Handbook 1: Cognitive Domain. New York: McKay.
3. Domin, D.S. (1999). A content analysis of general chemistry laboratory manuals for evidence of higher order cognitive tasks.J. Chem. Ed. 76,109 -111.
4. Evans, C. (1999). Improving test practices to require and evaluate higher levels of thinking. Education 119,616 -618.
5. Gage, N.L., and Berliner, D.C. (1992).Educational Psychology , Boston: Houghton Mifflin.