What I found more interesting was that lack of those tools in current teaching. I can't believe no one's made those kind of analysis tools available to teachers before.
Can't agree with this enough. Every time we make a new chart I think to myself, "Well that wasn't rocket science," and then when we show teachers they go absolutely nuts.
In a traditional class room its not possible to collect that data in a practical sense. Teachers are already over worked and technology is in short supply. Which is why tools like these are not available, its only possible here because all students are interacting with the khanacademy.org system.
