Standards for Professional Learning are forward-looking by nature because they drive continuous improvement in educator practice. But taking a brief look at the history of the standards is important for understanding their impact on the field and their role in today’s professional learning. As the field has shifted philosophy from staff development to professional development to professional learning, and as our organization has grown from the National Staff Development Council to Learning Forward, so, too, have the standards evolved. Over the last 30 years, we have regularly revised the standards to reflect emerging research, new knowledge about best practices, and policy shifts. But we have also retained core elements, continually building on the foundation of the first version of the standards from the 1990s. I