Education is one of the fields where Wikimedia can have its biggest impact as we work to make the sum of all human knowledge. Many Wikimedians integrate Wikimedia in their curriculum, teachers' training programs and so on but the practice of ECWOs is not yet well explored. Running Extracurricular Wikimedia organizations (ECWO) in educational institutions offers more flexibility than traditional Wikimedia practices as part of the curriculum itself. It allows training the students as open knowledge activists going beyond rigidly pushing Wikimedia to their coursework. This session covers the structure, activities and experiences of the ECWOs from around the world.