CRASH COURSE: Move over, Sal Khan. The goofy Green brothers (John and Hank) are mapping history and biology (respectively), promising to deliver 40 videos in a series they call Crash Course. With 11 videos made (and +2 million page views) their engaging 10-minute videos on chunks of curriculum winning fans. (The topics will look familiar to middle school and early high school students). Also good: this is part of YouTube’s education channel. A little backstory here from GigaOm.