As School Head or Division Head, you may already be immersed in the practice of Professional Learning Communities (PLC), or you may be just starting to integrate them into your practice. They can, of course, exist in various settings—here we will apply it strictly to teachers working together. The term dates from the 1960s when researchers were already trying to find an antidote to the isolation experienced by teachers. It gained popularity in 1993 with the work of Milbrey McLaughlin, when she and her collaborators identified the major characteristics of a PLC that have largely survived intact to this day.1 These characteristics include: