Classroom Video on Demand - this database contains a number of videos on WWII as well as archival videos
US History in Context - your go to database in history
Virtual Reference - there are several multi-user e-books that cover topics from WWII
When using databases try searching with different keywords to bring up different results:
World War II
World War II, 1939-1945
are just three ways to locate information. Start broad and then use the database menus to refine (narrow) your search.
You'll find great examples of WWII propaganda posters and other images on the Image Quest database.
Enemy has long ears, American propaganda poster, World War II, United States, 20th century found on Britannica Image Quest made available for educational re-use.