All 15 of the Century - America's Time video questions are available here. These are excellent documentaries for reviewing the 20th century and the video questions available here will keep the students engaged and paying attention throughout the 40 minute segments. My AP classes have been watching these for 10 years and have benefited greatly in giving them visual images to go along with their readings of the 20th century. Since these are all available on youtube.com it could easily be assigned outside of class as homework. Hope it helps your students as much as mine.