Indiana University
Indiana University: Using Databases
This brief tutorial gives a clear view of the strengths of databases, as well as how to search them effectively. It includes a summary quiz and a page of printable notes for future reference.
Other
A Primer on Databases and Catalogs
This in-depth look at databases does a thorough but not boring job of explaining how these critical tools operate. Macromedia Flash graphics and other interactive tools help engage students. It is not specific to any one kind of database.