This is the problem when hacker news tries commenting on Education. Readers here tend to be wildly ignorant about what's actually going on Education. How do you know that these teachers aren't doing things? Do you mean, they should be making a website? What if they don't think that rote e-learning is an effective way of learning (something that is greatly supported by the evidence)?
You see this video and you don't know about the years of criticism that has been laid against Khan. You don't see the suggestions that have been offered (and ignored). You don't see these things because you're not a member of that community. Just like these teachers probably have no idea about what's going on in the Rails community, you really don't know what's going on in theirs.
> What if they don't think that rote e-learning is an effective way of learning (something that is greatly supported by the evidence)?
I don't care about criticism of KA, I care about results for my kids. And I see positive results, so I have my own evidence that's contradictory, I guess. Given my "wild ignorance" of the education community, that's apparently the only measure I can use anyway, right?