I really like this book and I am sure that your fifth grade students will love it too! There are a lot of lessons that you could pull from this book. One could be a family tree. The main character in this book is cursed because of something that happened to his great great grandfather, so this could tie in coming up with their family history. Another lesson could be to write a letter. They could write to anyone in Stanley's (main character) camp. This could also be a positive lesson in which you can say digging holes are hard. Let's try and dig one and plant a tree/plant. The last lesson that I can think of is to create a map of Stanley's camp. There's the holes, dorms, dried up lake, showers, and so on.