William J. Rothwell: I dedicate this book to my wife, Marcelina V. Rothwell. She is the wind beneath my wings.

Bud Benscoter: I dedicate this book to the inspiring and inspired professors, colleagues, and students who influenced my commitment to the field of instructional systems design.

Marsha and Steve King: We dedicate this book to our son, John, who inspires us every day.

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