from a PBS press release...
PBS and WGBH , and their producing partners WNET and KET, along with 31 other PBS member stations, today launched PBS LearningMedia, a free service for all teachers, students and families nationwide... Delivering unprecedented access to a robust digital library aligned to Common Core State Standards and available to all preK-16 classrooms, PBS LearningMedia is the next generation in digital media platforms with high-quality content drawn from more than 1,500 public media producers, 350 local stations, such as WGBH's NOVA science series among many others, and a growing list of other contributors...
* quickly and easily find relevant resources, localized to their needs, to differentiate instruction for a diverse range of learners;
* personalize the site by tagging resources and share ideas, recommendations and comments on how they've used media assets in their teaching with their professional learning networks via email or social media tools, such as Facebook and Twitter; and
* develop "class pages" - curated content lists - for student viewing, feedback and instruction on interactive white boards and school-based intranets and other networking tools.
Site requires registering but all of the content is free for educators, students, and families.