Some background information about Superman
Here you'll find some information about Superman. The first link is a 2006 feature film documentary on the story of Superman, which is followed by a written Superman timeline in comics from the initial story in 1938 to 2008, which marked the 70th anniversary of the character, and finally, there's a 2-minute short animated film celebrating the 75th anniversary of the creation of Superman and featuring important moments in the life of the character across different media until the 2013 film Man of Steel. The extra material includes an old 45-minute documentary, a description of different continuities in comics, the specific continuity we are focusing on called "Modern Age Continuity" or "Post-Crisis Continuity," and finally, a glimpse at the complexity of the character that has had multiple reincarnations throughout his now almost 80 years of life.
Look, Up in the Sky: The Amazing Story of Superman (feature film documentary, 2006).
"Superman Timeline" (text, 2008).
Superman 75th Anniversary (commemorative short animated film, 2013).
EXTRA MATERIAL
The Story of Superman (documentary, 1990).
"Continuities" from Superman Wiki (text).
"Modern Age Continuity" from Superman Wiki (text).
"Superman" from DC Database (text).