Mind Games
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http://www.clickersolutions.com/articles/2001b/101.htm
http://www.clickersolutions.com/articles/2001/box.htm
http://www.clickersolutions.com/art...1b/begshape.htm
http://www.clickersolutions.com/art...lanscssions.htm
http://www.clickersolutions.com/art...1c/thinking.htm