I suppose all this experiment design will be helpful for academic theorists. In the real world classroom, Khan Academy is a HUGE step forward for almost any lea

I suppose all this experiment design will be helpful for academic theorists. In the real world classroom, Khan Academy is a HUGE step forward for almost any learning environment children are put in. I know, because I have experienced it myself -- watching a teacher understand they can see exactly which math subjects each student struggles with -- and watching students leap ahead when given the chance to work on topics interesting them and attach fun bragging rights for 'success' in a social computer classroom environment. The leap in engagement and skill building is so hugely marked that I don't believe it's ethical to keep children from such an experience unless there is strong evidence that it is actively harmful. All this is anecdote, not statistics of course. The kids I worked with using Khan Academy last year would say "Can we stay in from recess to do more math?? Are we doing Khan Academy today? YES!!" This level of response just isn't present with all but the most magnificent teacher in a more traditional classroom setting, and it makes me believe that there's something real and beneficial there.