The Louvre has an excellent digital library. Explore Islamic art, Roman antiquities, and works by the masters. Be sure to explore the link for teachers.
This tutorial, developed by the Purdue Research Library, helps students learn about planning a research project, identifying the information sources, using various search strategies, evaluating information, and ethically using information.
The Teaching with Primary Sources Program works with colleges and other educational organizations to deliver professional development programs that help teachers use the Library of Congress's rich reservoir of digitized primary source materials to design challenging, high-quality instruction.