First Vi Hart. Now Brit Cruise, whose exemplary work with videos and math instruction was featured in these pages a couple of weeks ago. For me, this has all the drama of some kind of skin graft or organ transplant where no one has any idea if the host body is going to accept or reject any of it. In both its videos and its exercises, Khan Academy has a distinctive house style. So does Hart's work and Cruise's to a lesser extent. It isn't remotely clear to me how any of those competing styles will interact with each other.
In news that's much less exciting, though still related to Khan Academy, I'm working with my advisor and two other graduate students at a charter school in San Jose. We're working with their teachers and Khan Academy to develop a blended unit on similarity, congruence, and trigonometry. ("Blended" is defined, in this instance, as a 1:1 environment that includes regular in-class use of Khan Academy.) It's my first in-the-classroom experience with either blended learning or Khan Academy. There's probably a lot that should be said about the experience but I'm still learning.