Though I'm not a huge fan of Crash, I believe it's a fantastic idea to show it in high school classes. It does have a very good message and it seems to be something modern youths can relate to and be both entertained and moved by. I am sure it would compel them more than a boring documentary where tons of white men tell them how relevant Dr. Martin Luther King Jr. still is. This is an in your face, thrilling film which applies it's message to real-life situations most of us could theoretically find ourselves in.
I would also love to see Syriana and The Constant Gardener shown in high school classes.