This is an excellent resource to understand mediation as defined in the Common European Framework of Reference (CEFR). It breaks down the concept into its core components—text, concept, and communication mediation—and illustrates how learners can act as linguistic and cultural intermediaries. The resource offers concrete classroom activities, descriptors, and assessment strategies that show how learners can reformulate, summarize, and facilitate understanding for others in diverse communicative contexts. It also provides insight into the social and collaborative dimensions of mediation, emphasizing its role in fostering inclusive and plurilingual learning environments. Ideal for language teachers and curriculum designers, this guide bridges theory and classroom application, helping educators to scaffold mediation tasks across proficiency levels while supporting learners in developing key 21st-century skills such as critical thinking, empathy, and intercultural competence.