"The Digital Library for Earth System Education (DLESE) is a distributed community effort involving educators, students, and scientists working together to improve the quality, quantity, and efficiency of teaching and learning about the Earth system at all levels." The site includes etensive Educational Resources and Earth Science Literacy Maps, and allows you to narrow your search by Grade Level, Resource Type, Collections, and Standards.
"The Digital Library offers a searchable database of detailed personal information about slaves, slaveholders, and free people of color...The site provides access to information gathered and analyzed over an eighteen-year period from petitions to southern legislatures and country courts filed between 1775 and 1867 in the fifteen slaveholding states in the United States and the District of Columbia."
"The World Digital Library (WDL) makes available on the Internet, free of charge and in multilingual format, significant primary materials from countries and cultures around the world." From a map of the world, click on a country and then choose from place, time period, topic, or type of item (maps).
NSDL is the Nation's online library for education and research in
Science, Technology, Engineering, Mathematics. Follow the "Resources for K-12 Teachers" link (http://nsdl.org/resources_for/k12_teachers/) and then click "Middle School."
"WorldCat.org lets you search the collections of libraries in your community and thousands more around the world. WorldCat grows every day thanks to the efforts of librarians and other information professionals."
"This site allows you to search and view newspaper pages from 1860-1922 and find information about American newspapers published between 1690-present. Chronicling America is sponsored jointly by the National Endowment for the Humanities and the Library of Congress as part of the National Digital Newspaper Program (NDNP)."
The premier site for primary sources. Click on the "Classroom Materials" link for Lesson Plans, Themed Resources, Primary Source Sets, Presentations & Activities, and Collection Connections
"S.O.S. for Information Literacy is a dynamic web-based multimedia resource that includes peer-reviewed lesson plans, handouts, presentations, videos and other resources to enhance the teaching of information literacy (K-16)"
" A guide to commonly encountered toxic chemicals, environmental health risks, and the public's health. From the US National Library of Medicine." Interactive!
"An image database of over 7,000 U.S. and Canadian advertisements covering five product categories - Beauty and Hygiene, Radio, Television, Transportation, and World War II propaganda - dated between 1911 and 1955."