Salman Khan, the founder of the incredibly successful Khan Academy of short, low-production value/low-cost, highly effective educational videos talks about educating online and the use of engaging video produced with passion.

From the TED website:

Salman Khan talks about how and why he created the remarkable Khan Academy, a carefully structured series of educational videos offering complete curricula in math and, now, other subjects. He shows the power of interactive exercises, and calls for teachers to consider flipping the traditional classroom script — give students video lectures to watch at home, and do “homework” in the classroom with the teacher available to help.