This POWERSEARCH searches all of these databases simultaneously: Education Research Complete, Educational Administration Abstracts, ERIC, and Professional Development Collection.
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.
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.