This article may be accessed from the following website (additional fees may apply): http://findarticles.com/p/articles/mi_qa3950/is_200301/ai_n9173558 One of the many challenges of teaching, especially on the lower level, is that of motivation. Thus, problems that students recognize as meaningful in life are of great help in the classroom. This problem could be used in algebra or a statistics course to provide motivation. The following analysis has students calculating appliance efficiency using basic arithmetic, and they can take this problem home to their own appliances as well as apply these skills to their future purchases.
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Farnsworth, David, "Energy guides as teaching aids" (2003). Mathematics and Computer Education, vol. 37 (N1), 115-120. Accessed from
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