I am very excited to feature a great web resource to you. My wife found out about this when she was looking for resources for a faculty meeting. The Teaching Channel is a compendium of comprehensive and growing videos that are easily organized, saved, shared, and soon to be downloadable. Moreover, the videos are focused on Common Core and Best Practices.
Here are the categories delineated by subject, grades, and topic. Notice the 140 videos all relating to the Common Core integrations.
Not to mention they have some really teacher friendly tools like the Workspace. Here teacher, administrators, and coaches can schedule videos, save links, and connect to other educators.
Overall the site is very easy to manipulate and maneuver. Check it out: The Teaching Channel