I have always had the hardest time organizing my class library. This website/app lets you scan all of your library books using your iphone. It also allow you to upload your class list so that you can check out books to students. Therefore, all of your books are accounted for at all times. You can even set up an email that goes out to parents when your students' books are overdue. Did I mention it's free? OH YEAH! How cool is that?
Here's the link:
I am all about working smarter not harder. :)