Theory and research. Understanding internal motivation -- "Where's the evidence?" -- Elementary school. Competition is as important as cooperation -- Helping students value learning -- From bossing to leading -- "Consequence" is not a four-letter word -- Middle school. Positive relationships support competence and high standards -- Self-evaluation leads to lasting change -- Inspiring through collaboration -- Being what we choose -- High school. Creating a need-satisfying environment -- From telling to asking -- From enforcing to teaching responsibility and fostering positive relationships -- Reflections of a high school senior.