I also ordered a stamp for my library because I got a grant last year from Donors Choose for $800 worth of books! So then I needed to make sure those precious books never left my sight. Instead of writing my name in all those books, I had a stamp designed with my name on it. Now I just stamp all my new books.
Finally, I ordered a stamp that was just plain cute. I have not decided how I would use it other than at the bottom of letters to parents and things like that but I could not help but order this stamp because it was so cute.
If you are interested in ordering stamps for your classroom head on over to Simply Stamps, they can design anything you like. I was so impressed with how fast they were able to create special stamps just for me.