Just over a year ago I wrote a balanced review of some of the Khan Academy videos about statistics. I can’t even imagine what the history teachers say about your content-driven delivery, but I will stick to what I know. (And these tests are clearly testing the type of material you are helping them to pass!) The bloggers are not so happy, because you perpetuate a type of mathematical instruction that should have disappeared by now. The parents love you because you help their children pass tests.

This opinion is borne out by comments I have read from parents and other bloggers. I fear that the reason that so many people like your mathematics videos so much is not because the videos are good, but because their experience in the classroom is so bad, and the curriculum is poorly thought out and encourages mechanistic thinking. Like many others, I believe that something as popular as Khan Academy will benefit from constructive criticism. Some of your materials are not very good, though, so I am writing this open letter in the hope that it might make some difference.

You have created an amazing resource that thousands of people all over the world get a lot of help from.

Khan academy probability videos and exercises aren’t good either

Khan academy statistics and probability