Online education has become a trend worldwide. In China, Tsinghua University is collaborating with MOOC. Their efforts, however, move beyond developing new courses online. Using the OpenEDX platform, they design and launch their own system. New components have been designed to expand the capabilities of the platform. Special efforts have been dedicated to super large class size (more than 6000 registrations in “Data Structure”). In this talk, we take a close look at their results. Discussion will then be opened up for comments and suggestions to our future efforts.