Bowen Kerins documents a high-leverage practice:
The concept of guess-check-generalize starts by changing the nature of the problem. The question to start with changes from “What is the correct bar height?” to “Is 100 the correct bar height?”
Later, he notes that guess-check-generalize can reduce the difficulty level of word problems “by 2 or 3 grade levels immediately.” Of course, once you reach the point of generalization, the problem is just as challenging as it was before. The difference is how many more students you help reach that point.