The engine of school improvement is feedback. Though the education airspace is swirling with curriculum reforms and scheduling adjustments and improvement plans, the direct pathway to helping teachers to more effectively teach is via feedback about their teaching performance. Yet data tell us that few teachers, and even fewer principals, receive regular feedback that is concrete, specific, instructionally-relevant and likely to help them improve classroom instruction. But why? In this brief, we will explore the importance of providing effective performance feedback, highlight common barriers encountered by education leaders and teachers in the feedback process, and pose questions for district and school leaders to consider to make the feedback process more effective. Read the brief now!