Here are some recommended websites with good information about World War I

• World War I
• Origins of the First World War
• World War I
• History of World War I
• World War I: Trenches on the Web
• First World War.com
• BBC's World War One site has a variety of primary sources available dealing with the Great War.  Check especially the site for teachers, www.bbc.co.uk/schools/worldwarone/.  Also, World War I Remembered:  A BBC Special Report.
• PBS The Great War
• America and World War I by Jud Sage, my history colleague at Northern Virginia College
• Russia and World War I, my remarks on Russia's war effort; The Great War, my remarks on the Great War for my history courses
• WWI Sites: Links to Other Resources, including the World War I Document Archive.