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In education systems around the world, planners and policymakers are beginning to understand the importance of whole-system improvement. To best address teaching and learning outcomes, teachers and head teachers need this whole system support to build professionalism and improve their practice. The ‘middle tier´ of education systems, or those professionals working between the school and central level, may offer a unique opportunity to facilitate collaboration, broker knowledge, scale innovations and provide instructional direction to school level practitioners.