http://www.washingtonpost.com/blogs/answer-sheet/post/khan-academy-the-hype-and-the-reality/2012/07/22/gJQAuw4J3W_blog.html
I've seen this shared several times already, but I wanted to add this thought: While Sal Khan should be applauded for his contributions, I sincerely hope that five years from now we'll look at his videos as they are now and think, "Wow, I can't believe we ever thought these were good. What we have now is so much better!" If people like Karim Kai Ani (the author of this article) keep the pressure on Khan, we might not even have to wait five years. There's a place in education for free, self-administered video lessons, but to make true progress we're going to need (a) better videos and (b) a better perspective and understanding about how and when to use them. If this article will be remembered for anything, I hope it's the quote, "Experienced educators are concerned that when bad teaching happens in the classroom, it’s a crisis; but that when it happens on YouTube, it's a 'revolution.'"