I don't really have much to say about this paper. Problem solving is a skill that needs to be taught in computer science (if it can be taught) and the author of this paper demonstrates a few methods he has used to teach it. However, while the examples he uses seem well suited to simple concepts, I'm not sure how scalable his approach is.

I don't think that the ideas presented in this paper would carry over into more complicated areas of problem solving. Having students stuble onto solutions by themselves is a good idea, but I'm not sure how well it works beyond the very first exposure to binary structures and sorting algorithms.