My rising 10th grader requested to focus on WW1 and WW2 for American History next year, although I'll probably structure it more like a World History class for better context. Resources I currently own are The Human Odyssey volumes 1-3, American Odyssey, all volumes of The Story of U.S., and Ken Burns' documentary The War.
Has anyone here spent extra time studying this time period with their high schoolers? Do you have any excellent additions or spine recommendations?