This is a great lesson, as you are able to use various tools to look at the Battle of Gettysburg. the first part of the activity uses short, documentary videos to visually show the students the devastation endured during the battle. The second part of the activity uses reading strategies, and maps to help students analyze how the battle, itself- became the deadliest three-day battle of the Civil War. The activity takes a full class period, possibly two. I print the reading activities and put them in page protectors for my other classes to use.
My students enjoyed this activity- and I hope yours does, too!