Do you know anyone that is in more than one of your classes? What if you make a deal where they bring the book for one class and you bring it for another. During class you share. My classroom is composed of table-style double desks. With two students each using a book, notebook, pencil box, protractor, etc., it gets crowded. They always share books. As long as they are paying attention to the lesson, I can't complain. Heck, 11-year-olds are great problem solvers.
If your teachers have a problem with sharing, have them supply a few extra books in class. I know on my campus there are always places we find extra books sitting around. Or, have them call me!
