This evaluation report is intended to support Ministry of Education's decision making about the future of the NEX initiative. The evaluation findings also provide useful insights that contribute to Teacher Development Aotearoa's review of their leadership of the initiative and will be of interest to current and future NEX leaders. Three overarching questions framed the evaluation: (1) To what extent is the NEX initiative achieving desired outcomes and having an impact? For whom, in what ways, and in what circumstances?; (2) What features of the initiative are particularly successful and support NEX to have an impact on teaching and learning?; and (3) What changes would improve the model for the future? These questions align with the Government's new Social Investment approach where monitoring and evaluation is used to "understand how effective our interventions are--is what we are doing having the intended effect/what might we need to change?".