This document contains summaries of presentations given to students on communication media theory and related topics. It includes: 1) Discussions of the differences between Web 1.0 and Web 2.0 eras, and how social media has enabled two-way and multi-way interactions. 2) An overview of how public broadcasters are funded in different countries, such as through TV license fees in Europe or government funding in China. 3) A summary of Jurgen Habermas's views on the public sphere and how it should not be influenced by politics, business or allow exclusion. 4) Examples of exercises assigned to students, including debates on introducing ebooks and analyzing the impacts of spreading rumors online