Electronic Proceedings of the Eighteenth Annual International Conference on Technology in Collegiate MathematicsOrlando, Florida, March 1619, 2006Paper S005
This is an electronic reprint, reproduced by permission of Pearson Education Inc. Originally appeared in the Proceedings of the Eighteenth Annual International Conference on Technology in Collegiate Mathematics, Edited by Joanne Foster, ISBN 0321491602, Copyright (C) 2007 by Pearson Education, Inc. 
Using Internet Applets, GSP, and Other Representations to Increase Student Understanding of the Geometric Mean 
James R. Olsen
Mathematics Department
Western Illinois University
Macomb, IL 61455
USA
JROlsen@wiu.edu
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 Dan Gustafson
Mathematics Department
Western Illinois University
Macomb, IL 61455
USA
DJGustafson@wiu.edu

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We will look at numerous characterizations of the geometric mean (spanning all five NCTM content areas) and demonstrate some applets, GSP sketches, graphing calculator strategies, and other representations for illuminating these characterizations. Our goal is for our middle school/secondary teacher education students to have a wellconnected understanding of geometric mean.
Keyword(s): Geometer's Sketchpad, Java, graphing calculators