The previous thread: https://news.ycombinator.com/item?id=9362252

A cached copy: http://webcache.googleusercontent.com/search?q=cache:v36n9t1...

Most schools follow Socrates, sort of. Tests and textbook exercises are a conveyor version of "teaching by asking". Just like grades, they works in a perverse way until someone patiently explains the child what's the real purpose of the whole affair.