C-Span
http://www.c-span.org/classroom/lessonplans/lessonm.asp
This site has teacher guides for lesson plans on the media and U.S. Politics.

The PBS Democracy Project
http://www.pbs.org/democracy/classroom/
This is a great resource for elementary, middle, and high school teachers.  This site has numerous suggestions for teaching students about how our government, especially the election process, works.  Of added interest are the links on individual U.S. presidents.  There are also links for middle and high school teachers about ideas for "media studies," which help students think critically about the TV media and advertising agencies.

National Archives
http://www.nara.gov/
    See, for example, the teaching examples from Broadcasting History, such as FDR's "Day of Infamy" Broadcast.
   http://www.nara.gov/education/teaching/fdr/infamy.html

Society for Cinema Studies
http://www.tcf.ua.edu/ScreenSite/educate.htm
This site offers sample syllabi from a wide variety of courses (primarily college level) on media-related topics.