These are a fantastic resource (I've actually up-voted the submission), and everyone should know about them, but do we have to see them here so often?

http://searchyc.com/submissions/Khan+academy?sort=by_date

http://news.ycombinator.com/item?id=1459869

http://news.ycombinator.com/item?id=1415147

http://news.ycombinator.com/item?id=1351584

http://news.ycombinator.com/item?id=1177230

http://news.ycombinator.com/item?id=995830

http://news.ycombinator.com/item?id=993632

http://news.ycombinator.com/item?id=898167

http://news.ycombinator.com/item?id=892222

http://news.ycombinator.com/item?id=733383