How can teachers and teacher educators enact positive change in their working environments? How can they develop professional learning communities? How can they support educational policies on intercultural competence, multilingualism and plurilingualism while improving students' language skills? This inspiring collection gives clear and practical advice on how action research can help achieve all of those goals, from primary through secondary, higher and adult education settings. Action Research Communities for Language Teachers, funded by the European Centre for Modern Languages of the Council of Europe, collects practical first-hand accounts of action research projects, with a shared focus on practical, replicable advice and achievable results. Readers can use these examples to develop small, evidence-based interventions that address their own common challenges and concerns. Spanning fourteen European countries and a similar range of taught languages, these real-life examples of shared problem-solving and collaboration are a crucial contribution to the theory and practice of language teaching and teacher education.