Expressions like "magic" are simply ways of making it clear that the notion of what is or isn't possible is orthogonal to the question of what this specific pro

Expressions like "magic" are simply ways of making it clear that the notion of what is or isn't possible is orthogonal to the question of what this specific program does or doesn't do. But as far as your points go, the second one is the most interesting. yes, we should have a good look at what happens when "advanced" students are exposed to any method. Some advanced students might even get even better and increase the variance! I can't comment on this program, I know nothing about tutoring. But I know that I personally like breaking things down into little steps, and I think I would have enjoyed a program running on these lines if I was allowed to move at my own pace.