This writing endeavor is the result of many projects, studies, and prior undertakings involving many individuals. Each of these people contributed in meaningful ways to our understanding of what it means to be an effective teacher. Through countless workshops, we have heard teachers, principals, and superintendents ask: What is an effective teacher? ▲ How do you help good teachers become even better? ▲ What tools and techniques are available to support and sustain quality teaching? The Handbook for Qualities of Effective Teachers is our way of beginning to address these complex and profoundly important questions.