High-quality professional learning can build principals' capacity to lead successful schools. This brief summarizes a study about principals' professional learning based on a national survey of elementary school principals. Many surveyed principals reported that they had access to professional development that has been identified as important for leadership, but fewer had opportunities to participate in job-embedded professional learning, which research shows helps principals apply their learning. Most principals wanted more professional development, particularly on educating the whole child and on leading equitable schools. While a high percentage of principals said their districts supported their continuous improvement, many reported facing obstacles to participating in professional learning such as not having enough time, lacking sufficient coverage for leaving their building, and not having enough money. [For the full report, see ED610880.]