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."
Science-related videos from Wired Magazine and PBS: "Each week, WIRED Science correspondents take viewers to the frontiers of discovery across the country and around the world, spotlighting the cutting-edge innovations and research that are defining 21st-century culture, and introducing the high-tech mavericks who are making it happen."