References
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- Gabel, D. 1999. Improving teaching and learning through chemistry education research: A look to the future. Journal of Chemical Education, 76(4): 548–554.
- Johnstone, A. H. 1991. Why is science so difficult to learn? Things are seldom what they seem. Journal of Computer Assisted Learning 7(7): 7583.
- National Research Council (NRC). 1996. National Science Education Standards. Washington, DC: National Academy Press.