As a contribution to Pi-Day 2013 (later this week on 3/14), a Mathdub was filmed at CWI. In this mathematics-themed lipdub, various actors from the world of mathematics show the story of a young girl struggling with her maths homework. Organized by Hans Wisbrun, CWI supported this event by providing a location and facilities for filming.
Watch the Mathdub here
English translation included in the video's description