Teachers' Domain is a free digital media service for educational use from public broadcasting and its partners. You’ll find thousands of media resources, support materials, and tools for classroom lessons, individualized learning programs, and teacher professional learning communities. You will need to sign up to get unlimited access, but it is free. The categories of videos include Math, Science, Language, Social Studies, and Art. The site is associated with Zoom, CyberChase, Between the Lions, Nova and more. I have used this site to show me how to an experiment, step by step, from a video. It even indicates the Ohio Standards and a written explanation "Background Essay" for each video.
http://www.teachersdomain.org/
http://www.teachersdomain.org/
