An abundance of research suggests that effective school leaders are vital to promoting student outcomes in schools across the United States. Recognizing this, many state and local education agencies are motivated to develop a strong corps of highly qualified principals and assistant principals. Although a lot of emphasis is placed on recruitment and preservice training for new principals, many school districts are also working to support administrators once they are placed in schools. However, relatively little is known about the types of on-the-job supports currently available to school leaders, particularly on a national scale. In this report, we present findings...