Great homework or classwork assignment (but discussion must occur in class) in order for students to understand the origins of the U.S. Civil War. Historians disagree as to what the main cause of the U.S. Civil War was. Have students read and annotate these printed slides - or discuss them with students aloud. Then, have them rank order the most significant cause all the way down to the least. Then, have students share their findings in small groups with the hope that disagreement and more discussion will ensue. Make sure students support their claims with detailed evidence. Also, if you need further readings for your students, plug the following into google in order to find some great academic articles: historians (or historiography) causes (or origins) of the Civil War.