Kahn Academy Described

I found this TED talk presentation a better way to understand Kahn Academy, and its progress as a tool for schools.  I think some educators have been hesitant to support Kahn, partly because students would be consuming, rather than producing the videos (which would not technically be consistent with constructivist ideology.) This presentation shows how such a tool can put students in the drivers' seat while respecting and supporting the unique role of the teacher.