I highly recommend the movie "The Devil's Arithmetic" for your granddaughter. (The film is "Based on the popular novel by Jane Yolen, a typical American teenager gets transported back in time and experiences firsthand the horrors of the Holocaust and discovers the meaning of her familys heritage.")
From Amazon.com:
Executive producers Dustin Hoffman and Mimi Rogers present the truth of the Holocaust so a new generation can understand why it must never be forgotten. Kirsten Dunst plays Hannah, a modern teen more concerned with trends than history. During the traditional Passover dinner, she zones out as her relatives harp about concentration camps. But then Hannah passes through a portal to the past, where she becomes her own ancestor in Poland during the Nazi persecution of the Jews.
When teaching middle school social studies and language arts, I would have the kids read that book, and then watch the movie. I had heavily diversified students, most of whom never had heard anything bad had ever happened to anyone who wasn’t black. I am haunted by a scene in that story about a women who secretly gives birth in the camp, and then, of course, gets caught.
Thank you. I’ll do that. Sounds like something she’d watch many times.