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NOTICE: The project that is the subject of this report was approved on April 8, 1997 by the Executive Committee of the Governing Board of the National Research Council (NRC), whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The project was approved on April 14, 1997 by the Board of Directors of the National Council of Teachers of Mathematics (NCTM).

This report has been reviewed by a group other than the authors according to procedures approved by a Report Review Committee consisting of members of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine.

This project was supported with funds from the National Science Foundation, the National Education Goals Panel, and the National Council of Teachers of Mathematics. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect those of the funders.

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Copyright 1997 by the National Academy of Sciences. All rights reserved.

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