Reddit mentions of Number the Stars - Teacher Guide by Novel Units

You should also pick up Fred Korematsu Speaks Up some of my fellow grad students literally did not know about Japanese internment camps in the US. :'(

For the holocaust unit we did when I was in grade school, we read the Diary of Anne Frank.

I also read Number the Stars as a kid and here's a Teacher's Companion for it.

All the Light We Cannot See is also a really good book and gives the view points of two very different people. The Book Thief is also really really good.