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2National Research Council. National Science Education Standards. Washington, DC: National Research Council, 1996.
3Norm G. Lederman, Found Ahd-EI-Khalick, Randy L. Bell &Rene'e S. Schwartz. (2002). Views of Nature of Science questionnaire: Toward Valid and Meaningful Assessment of learners' Conceptions of Nature of Science. Journal of Research in Science Teaching, 39(6), 497-521