Singin the School Library Blues

Due to budget cuts and a small town economy my local middle school has been unable to purchase new books or magazines for about 5 years. New books are usually purchased by the librarian out of her own pocket. Sometimes a parent or teacher will donate a book.
I know that there are countless school libraries around the country suffering similar circumstances.
In an effort to get newer titles in the hands of kids I've been donating finished copies of books sent to me for review and books that I win from contests. It's not a lot, in fact it barely seems to scratch the surface. But it feels like I'm making a small difference.
So here's my question-Does anyone else donate to their local school libraries or public libraries? What do you do with the books you review? Do you keep them or pass them on?