This Apple Keynote presentation is an introduction to the book "Number the Stars" by Lois Lowry. It's designed to discuss some of the events of WW2, including the Holocaust & the rescue of the Danish Jews.
This book is brilliant, but is at a 4th-5th grade level. Of course, the horrors of WW2 are not told in detail, nor are there any explicit descriptions or pictures of what took place.
This will help the class have a background of the truth behind this historical fiction book before they begin.