Group items tagged

gives you what it refers to as the very best resources for scientific research and for educational purposes. The sites that are added to this site are inspected and judged before they make it on to the Intute site so that you have less work to do. Aside from gathering a number of high quality resources for you to use all in one place, this type of screening process also cuts down on the spam interruptions that one often finds when surfing the web

These lesson plans are complete with multimedia, readings, discussion questions, activities and hands-on production projects that enable students to strengthen their understanding of copyright and fair use. There are strands for high school, undergraduate and graduate learners.

impressive, free version, as well as a pro version (per month fee)

The DeepDyve research engine uses proprietary search and indexing technology to cull rich, relevant content from thousands of journals, millions of documents, and billions of untapped Deep Web pages.
Science oriented

a free, easy-to-use Firefox extension to help you collect, manage, and cite your research sources. It lives right where you do your work - in the web browser itself.