FROM THE 1980s: What Should Not Be in the Algebra and Geometry Curricula of Average College-Bound Students?
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Transformations, coordinate geometry, calculator and computer graphics, and the increased attention to applications have all caused, without any fanfare, changes in how we look at the shapes of figures. This talk will look at the changes in school geometry in grades 3-12 over the past half century from the standpoint of the concept of shape.