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This volume was made possible through a professional development award from RTI International; the book's editor and chapter authors also wish to recognize, with deep gratitude, the editorial and production support of Erin Newton (RTI) in compiling this volume. Also notably, portions of the editorial introduction were completed as part of the requirements for the Graduate Certificate in Adult Education at Portland State University, awarded to the editor in July 2017 under the same professional development award. The editor gratefully acknowledges the support of Dr. Andrew Job (Portland State University), Dr. Benjamin Piper (RTI), Dr. Matthew Jukes (RTI), and Jennae Bulat (RTI) for comments on early drafts.