Teach your students the Dewey Decimal system with this great interactive site
/Libraries are still a great resource in the 21st century and every student should know how books are universally catalogued and stored so that they can find content that interests them without the need to browse thousands of books.
Dewey Digger is a great little site that explains all of the different sections of libraries and would be a great site to share with your students before you head to your next borrowing session. Very easy to use and full of great content. Access it here.