As highlighted in Chapters 4 and 5 , clear leadership in building school ownership and capacity are key strategies for successful implementation of health promotion in schools. At school level the key person in building ownership of the health promoting organisational change process is the principal in that he or she is in a core position to motivate the stakeholders (students, staff, parents and collaborators) to carry out the needed actions. Further, the principal and school leadership can prioritise resources and time to stimulate a supportive context for the implementation. Leadership is, however, not only important at school level. Clear leadership at regional and national level giving priority and support to implementation of health promotion at school level represents a critical source for stimulating concrete actions at school level. The two case studies in this chapter from Canada and Norway demonstrate the importance of these two leadership levels.