Purpose: Through description and consideration of 12 models developed as part of the International Successful School Principalship Project (ISSPP), a new model of successful school leadership is developed. Design/methodology/approach: The paper is necessarily descriptive in nature. For the first time, 12 ISSPP models are described together, and these descriptions are then used inductively to create a new successful school leadership model. Findings: The open systems approach adopted depicts schools as a continuous cycle of input-transformation-output with feedback loops that inform each stage of the cycle. The inputs are the variables that lead to transformation. The transformation stage is the actions or processes that individuals, groups and organisations engage in because of the inputs, and these lead to a range of student and school outcomes. Feedback loops connect the stages, and the whole model is open to the influence of five contextual forces: economic, political, socio-cultural, technological and system, institutional and educational. Originality/value: Models are an important way to make sense of complex phenomena. A new model of successful school leadership, with an open systems approach, provides a different frame to consider the findings of the ISSPP and potentially allows the ISSPP research to inform practice and connect with other school leadership views in new ways.