Volunteer help needed!

Now that students are checking out books (not kindergarten) regularly, I would love to have volunteers who can come an hour or so a week to help re-shelve library books. Tuesdays are the only days that I cannot accept helpers because art is in the library all day on Tuesdays. I have always had student helpers in the mornings but my duties have changed therefore I am not in the library in the mornings.  Please let me know if you can help at all.