Students that are studying WWI or WWII would be interested in learning about Kathe Kollwitz. She was a German artist that did prints and charcoal drawings about the suffering and devastation she saw after both World Wars. She particularly concentrated most of her work on the emotion between mothers and children.
This presentation gives some facts about Kathe Kollwitz's life and art. It also tells a little bit about how the Nazis threatened her because she did not go along with their beliefs.
This would be a good introduction to look at before a unit on charcoal drawing, portraits, printmaking, or World War I or II.