The inclusion of cultural diversity - an imperative necessity in most western societies - is not only based on tolerance and respect. Heterogeneity, often considered as a great disadvantage, especially in the field of education, should be seen as a chance and an enrichment of host communities. Therefore, the contributions of this volume opt for a school education which offers equal opportunities to every student, including children and adolescents with migration backgrounds. A crucial issue in this context, beyond empathy and a positive attitude of both sides, is migration-induced multilingualism. This anthology provides insights into newer concepts of increasing diversification in migration societies and into individual multilingualism, which is not a deviance but an obvious human condition all over the world.