How do you make an event or performance accessible for everyone? What do you need to take into account and how do you work together with the experts in the field? To answer these questions, the TricS research group of our university developed a Massive Open Online Course on Accessibility Management together with national and international partners of the European ACT project. The project was led by the Autonomous University of Barcelona, and the MOOC is hosted by the UAB website Coursera. The course lasts 7 weeks, is taught in English, and is completely free of charge.