Kidipede is a kids' encyclopedia, online since 1996. A lot of kids use Kidipede for school reports or for homeschooling. You can find out about Ancient Greece or Ancient Egypt, or how to make yogurt, or about why fires need air to burn. Kidipede will tell you who invented algebra, and what happens in the Iliad, and what Confucius said. Click here to access it.
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.