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Over the past two decades, debate over the most suitable leadership role for principals has been dominated by two conceptual models: instructional leadership and transformational leadership. This article reviews the conceptual and empirical development of these two leadership models. The author concludes that the suitability or effectiveness of a particular leadership model is linked to factors in the external environment and the local context of a school. Moreover, the paper argues that the definitions of the two models are also evolving in response to the changing needs of schools in the context of global educational reforms.
Philip Hallinger (Sat,) studied this question.