"The Learning System" is a newsletter designed for superintendents and central office staff with professional learning responsibilities. This issue includes: (1) Principal-Coaches Transform Teachers and Schools (Valerie von Frank); (2) District Leadership: Delve into NSDC's [National Staff Development Council's] New Definition of Professional Learning (Hayes Mizell); (3) Focus on NSDC's Standards: Does Your Organization Really Support Professional Development? (Pat Roy); and (4) NSDC Tool: School Climate Index. (Individual articles contain references.) [For Volume 4, Number 7 of "The Learning System," see ED507670.]