Classroom observation can lead to telling teachers to do what I did, to advocating different ways of teaching, and to complying with accountability edicts. Trust-Based Observations starts where it matters, establishing trust, building on strengths, focusing on the impact of teachers on the learning lives of students, showing how to have open conversations about learning, and demonstrating collective teacher efficacy in action. -John Hattie, PhD, emeritus laureate professor, Melbourne Graduate School of Education, University of Melbourne, Australia; chair of the board of the Australian Institute for Teaching and School Leadership