Khan is a great supplemental tool and probably could not replace an 8 hour (different argument as to the effectiveness of such) "regular" school day. However,

Khan is a great supplemental tool and probably could not replace an 8 hour (different argument as to the effectiveness of such) "regular" school day. However, why not start even just a year-long study as to the effectiveness of Khan Academy being used within a syllabus for coursework as a supplemental resource or help for the students. Not all of the many video's of Khan Academy would be applicable to a teachers curriculum (like the category for Statistics as a whole has 66 videos). Some studies on the effectiveness of lack thereof would put most of the argument to rest. Though a very comprehensive study would include a Bill Gates esque full-online Khan Academy only program, perhaps 50% usage, 25% usage, etc.