Migration is a source of significant challenges and opportunities in Europe, as increasing flows of people seek new homes across the continent. International migrants made up approximately 11% of the total European population in 2019, or 82.3 million people, 2.8 million of whom are refugees and over 7 million of whom are below the age of 19 (Migration Data Portal, 2019). Recent years have also seen migrants from a much more diverse range of origin countries making their way to Europe, including to countries that had not previously been common migrant destinations. This movement places the successful integration of migrants and refugees into their host countries at the centre of migration policy in Europe. This report details work carried out by IMMERSE on the identification of indicators of migrant children’s socio-educational integration. By adopting a systems-based approach, influenced by Bronfenbrenner’s ecological systems theory, IMMERSE aimed at identifying indicators at the micro, meso and macro levels.