AVIOR, an Erasmus+ Strategic Partnership, aimed to narrow the achievement gap between native and non-native pupils in Europe. European partners collaborated to provide bilingual literacy and numeracy materials for primary school's children aged 4-8. Additionally, they shared best practices on creating inclusive multilingual classrooms among teacher trainers and school leaders. AVIOR's outcomes included enhanced school engagement and teachers who gained more awareness and insights into the benefits of multilingual teaching. It created a sense of identity for migrant children, along with increased parental involvement as their languages gained recognition in schools. Despite the project's impact, multilingualism remains uncommon in European schools due to cost and policy-maker awareness barriers. The project showed why multilingualism in European schools should be taken seriously.