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This systematic quantitative literature review was conducted to analyse and synthesise the extant corpus of knowledge on dialogic pedagogy within school settings, and thus identify theoretical and methodological gaps in the literature, which might suggest new avenues for research. A search of eight databases (2014-2020) revealed an initial pool of 2443 papers, which was reduced to 61 after screening for eligibility. An analysis of the 61 papers was framed around the following questions: What is the dominant mode of classroom discourse (monologic or dialogic) reported in the literature? Where is dialogic pedagogy being researched? Who are the dominant voices in the field? and Which year levels and school subjects have been examined using which methodologies? A key finding of the analysis was the absence of substantial research by Australian or New Zealand authors, specifically where mathematics education is concerned. Similarly, there is little investigation focusing on the early years of schooling. While some education areas have been well researched with regard to dialogic pedagogy, further work is required that focuses on areas such as the early years of schooling; non-science contexts; and the use of qualitative research methods. Keywords Systematic quantitative literature review * Dialogic pedagogy * Dialogic practices * Dialogic teaching, 1 Introduction The purpose of this systematic quantitative literature review (SQLR) (Pickering & Byrne, 2014) is to analyse the extant literature available (2015-2020 or 2014-2019 depending on search options available) [...]

Building on long-term benefits of early intervention (Paper 2 of this Series) and increasing commitment to early childhood development (Paper 1 of this Series), scaled up support for the youngest children is essential to improving health, human capital, and wellbeing across the life course. In this third paper, new analyses show that the burden of poor development is higher than estimated, taking into account additional risk factors. National programmes are needed. Greater political prioritisation is core to scale-up, as are policies that afford families time and financial resources to provide nurturing care for young children. Effective and feasible programmes to support early child development are now available. All sectors, particularly education, and social and child protection, must play a role to meet the holistic needs of young children. However, health provides a critical starting point for scaling up, given its reach to pregnant women, families, and young children. Starting at conception, interventions to promote nurturing care can feasibly build on existing health and nutrition services at limited additional cost. Failure to scale up has severe personal and social consequences. Children at elevated risk for compromised development due to stunting and poverty are likely to forgo about a quarter of average adult income per year, and the cost of inaction to gross domestic product can be double what some countries currently spend on health. Services and interventions to support early childhood development are essential to realising the vision of the Sustainable Development Goals.