Got to say I've seen this practice done a lot, but never found it beneficial as a class exercise. Nobody really learns anything through this. The person being a

Got to say I've seen this practice done a lot, but never found it beneficial as a class exercise. Nobody really learns anything through this. The person being asked tends to panic and muddles through. The people in the class who don't understand try to follow and end up more confused. This can go through a few rounds with more wrong answers. Eventually the lecturer or a student will give the right answer but half the people have tuned out already or lost their train of thought. I think it's a very bad way to learn anything. The actual method is sound when used outside of a lecture in one-on-one or small groups where everyone is involved, but fails terribly with large groups.