JoinThe Prepared Practitioner: The National Science Digital Library
The National Science Digital Library (NSDL)—a National Science Foundation–funded funded website—features tons of cool stuff for science teachers. On this site, users can find online teaching resources related to science, technology, engineering, and mathematics (STEM). This “mega-portal” offers links not only to individual websites but also to other large portal sites—called NSDL Pathways.