A fun and exciting activity to do with your class is Civil War Tug of War. This lesson explains how you can take your kids outside and have they kinetically experience the Civil War and how it worked out.
It will review the roles between North and South. It will display the advantages the North had in manpower, but also show the importance Southern Generalship had on the war.
You can alter this to fit your own class but having taught this its a must see for you and your class.