Jonathan Bergmann from "flipped classroom" spoke last week in Harvard. This week, there is a Washington Post article on the concept which is certainly gaining momentum.
I had a great conversation with Jonathan about the things that people mistakenly think about the flipped classroom. He insists that it is "NOT" about just video but about UDL and reaching every learner. He also says that students really like videos made in their own teacher's voice. (Which would counter claims that all the videos should be made for teachers.) This is a great article. Jonathan's book is coming out in June.
Tons of free Smart and promethean activities around a variety of topics, particularly UK history topics but also european. These are great for history teachers. (This is another great example of a site I found through the TES website, which is one of my favorite websites to go to for teaching ideas.)
More than 9,000 clips on many topics available for free and organized. You can peruse this list of clips which are also attached to lesson plans and activities. If you're looking for high quality video, this is a great free resources.