I have found the Choices Program out of Brown University to be tremendously helpful with these types of topics. (I highlighted some of their government curriculum in a previous post.) So far, I have only taken advantage of their free materials and am signed up for their email notifications, which included yesterday's link to a free lesson plan, "ISIS: A New Threat." I've only had a brief chance to look at this free material; however, I consider it an invaluable resource for teachers because it at least gives them a starting point for bringing in such a current event immediately into their classroom.
Curriculum from Choices Program