40 Maps that Explain WWI - Can be helpful for many assignments and just for better understanding of the war
Alpha History WWI - This site has some good overviews, timelines, and articles. It can be useful for your MAIN presentations.
Eyewitness to History - WWI - Primary sources from WWI
FirstWorldWar.com - Has lots of good info on the war. Can be used for MAIN presentations and Nature and Practice Packet.
International Encyclopedia of the First World War - This has a wealth of information and articles to use on MAIN presentations and Nature and Practice. Could be useful for Paper 2 essay as well.
PN Library - Use the databases in here for research - especially JSTOR, E-library, and ABC-Clio. For encyclopedia information, check out Britannica.
BBC - The First World War - Episode 1 - To Arms - The video is broken into 5 parts. They should auto-play in order...I think.