If you’ve followed ed tech chatter these past few weeks, then you know that the buzz around Khan Academy, the popular online repository of educational videos voiced by the charismatic Sal Khan, has taken a rather negative tone ever since two teachers at Grand Valley State University created "Mystery Teacher Theater 2000”—in the style of Mystery Science Theater 3000—a scathing response to a Khan video lesson about negative numbers.

Salman Khan, speaking at TED 2011. Photo by Steve Jurvetson.
For those of you without the nearly 12 minutes to watch the MTT2K video, which has more than 32k views, I’ll summarize: it is short on actual humor and long on math inside jokes and nitpicks about Khan’s methodologies. In fact, I had to watch the video three times to understand the gripes. My main impression is that makers of the video are calling out Khan for a technical flaw or two, and their commentary is tinged with more than a dash of disdain.
While I believe that even the most ardent fans, be they of Teach For America or Khan Academy, must be critically engaged, asking tough questions, and examining fundamental assumptions, there is an important distinction between critical feedback and cynicism. Robert Talbert offers a measured and balanced view on what he loves and doesn’t about Khan Academy: “I believe online video is an idea whose time has really come in education. I’m not jealous of Khan Academy. But I’m not an uncritical fan, either, and we need to look at carefully at Khan Academy before we adopt it, whole-cloth, as the future of education.”