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Contains more than 4,000 downloadable PDF versions of books published by the National Academies Press. Titles cover many subjects including biology, computer science, mathematics, chemistry, and physics.
JoVE: A One-of-a-Kind Video Journal
The Journal of Visual Experiments presents high quality, step-by-step video of lab methods along with a peer reviewed manuscript. It's the next best thing to hands-on experience in physical and life sciences!
Concept Exploration With Credo
Credo pushes online reference further, offering full-text articles and visual aids like videos and mind maps to help you explore topics and their related concepts in depth.