AccessScience is an authoritative and dynamic online resource that contains incisively written, high-quality reference material covering all major scientific disciplines. An award-winning gateway to scientific knowledge, it offers links to primary research material, videos and exclusive animations, plus specially designed curriculum maps for teachers.

NSDL is the National Science Foundation's online library of resources and collections for science, technology, engineering, and mathematics education and research.

An evidence-based, peer reviewed database of clinical information, covering more than 7,700 topics in 15 medical specialties and includes more than 80,000 pages of text, graphics, links to Medline abstracts, more than 260,000 references, and a drug database.

eLS features over 4,900 peer-reviewed and citable articles in the life sciences. eLS is updated by approximately 400 articles per year, with new articles publishing on a monthly basis.

Gale in Context Opposing Viewpoints is a dynamic online library of current event topics--the facts, as well as the arguments, of each topic's proponents and detractors. Unique features include Topic Overviews -- frameworks that allow students to explore each topic's many facets -- and exclusive electronic access to statistics, government data, information on legislation and more.