Encyclopedia Britannica: Middle School  
includes an encyclopedia, atlas, dictionary, timelines, quotations, "this day in history," and more.

ProQuest Newsstand
Full text for the Minneapolis Star Tribune, Sioux Falls Argus Leader, St. Cloud Times, Wall Street Journal, Washington Post, The New York Times, Los Angeles Times, Barron's, USA Today, and hundreds of other newspapers.

Camio
OCLC's Catalog of Art Museum Images Online - is a growing online collection documenting works of art from around the world, representing the collections of prominent museums .CAMIO highlights the creative output of cultures around the world, from prehistoric to contemporary times, and covering the complete range of expressive forms.

Gale      
includes many databases for middle school:

Discovering Collection
Discovering Collection offers easy access to award-winning content based on national curriculum standards. Covering the core curriculum areas, including history, literature, science, social studies, and more, DC provides a premium selection of reference, primary sources, creative works, and multimedia, including hours of video and audio clips. New to the database are popular topic picklists and an integrated national and state curriculum standards search with content correlated to the standards.      

InfoTrac Junior Edition
Designed for middle school students, this database has full-text articles from magazines, newspapers, and reference books in just about every subject area.   

Junior Reference Collection
Designed for students grades 6-8, this database has information from reference books about people, places, history, science, and more. Includes photos and maps.

Kids InfoBits 

This database has articles from magazines, newspapers, and reference books on animals, famous people, science, countries and states, and more.

EBSCO  
includes many databases for middle school :

Funk & Wagnalls New World Encyclopedia  
This database provides over 25,000 encyclopedia entries covering a variety of subject areas.

Middle Search Plus
Contains full text for more than 140 popular, middle school magazines, biographies and historical essays, primary source documents, and reference books. An image collection of over 400,000 photos, maps, and flags is also included.

Science Reference Center
Science Reference Center is a comprehensive research database that provides easy access to a multitude of full text science-oriented content. This database contains full text for nearly 640 science encyclopedias, reference books, periodicals, etc. Topics covered include: biology, chemistry, earth & space science, environmental science, health & medicine, history of science, life science, physics, science & society, science as inquiry, scientists, technology and wildlife.

Student Research Center
Helps middle and high school students find magazine and journal articles, reference materials, and multimedia files covering all topics. Contains the following databases: Health Source-Consumer Edition; MAS Ultra-School Edition; Middle Search Plus; and Science Reference Center. Intended for grades 6-12. 

Consumer Health Complete
Designed to support the information needs of patients and to foster an overall understanding of health-related topics from mainstream medicine to the many perspectives of complementary, holistic, and integrated medicine.