Documentary filmmakers will gather at DePaul University’s School of Cinematic Arts in downtown Chicago on October 19th and 20th to teach free master classes on the technical and creative aspects of their work including a master class in skateboard filming at the Grant Park Skate Park with Bing Liu and a master class in documentary production sound with industry experts. The conference includes a screening on the 19th of Bing's award-winning film “Minding The Gap” with a discussion after. Master classes both will be held on the 20th.