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Preface Attribution and Acknowledgements
This work includes materials used under license from the following works:
The authors would like to acknowledge the contributions of Wendy Sheppard to drafts of
Chapter 4 .
This work is supported in part by a grant from Affordable Learning Georgia.
This material is based upon work supported by the National Science Foundation under Grant No. DUE-2011807. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.
