A guide to planning and implementing brief but focused classroom observations that involves teachers in every step of the process. Drawing from their study of 40 schools in the United States and Canada, the authors show how administrators and teacher leaders moved teachers from resisting to embracing the practice. This book demonstrates that when teachers learn from one another in a cycle of continuous professional growth through observation, shared inquiry, dialogue, and follow-up they develop a sense of collegiality and a common mission. By opening their doors to their peers, they also contribute to broader school improvement efforts that positively affect teaching and learning throughout the school.