MATHAGOGY | two minute mathematics education

Mathagogy is a site with teachers using two-minute videos to explain how they teach some aspect of mathematics. It could turn into a really cool site, but I'm somewhat skeptical due to the arbitrarily short length of the videos. Let me put it a different way: If Sal Khan kept all of his videos at 2 minutes or less, I'm sure many teachers would add that to their criticisms of Khan Academy.