It seems a bit strange that Mr Clemens [1] who is a English teacher that teaches online courses is commenting on issues concerning online teaching in history. Regardless he does bring up some very valid points that have plagued history scholars for centuries, but offers no real solution. I suppose the title "The Dangerous Mr. Kahn" that suggests that Mr. Kahn is dangerous to history education is a bit too sensationalist to suggest that he is any more dangerous than today's media, school teachers, disagreeing historians, and countless other attempts to present historical information in a categorical way. Everything is up to interpretation.

My interpretation of his overall point is that "no one person should control the messages of history". There is definitely some work to be done by Mr. Kahn in this regard and given his very open mind I don't doubt he already has considered this.

[1]- http://www.mpcfaculty.net/david_clemens/default.htm