With increasing migration into and within an already culturally diverse EU, there is an urgent need for more knowledge sharing on the nature and effectiveness of cultural and social integration processes. This report focuses on the part played by formal education systems in the integration process. This report is of interest and relevance to a large number of policy-makers primarily in, but also well beyond, the field of education. It highlights key conclusions emerging from state-of-the-art European and international research and their implications for policy. It aims to inform policy-makers and support their decision-making in the ongoing process of system reform.