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John Jewett developed over 160 tutorials that strengthen students' problem solving skills by guiding them through the steps in the problem-solving process. Important first steps include making predictions and focusing strategy on physics concepts before starting to solve the problem quantitatively. A critical component of these tutorials is the selection of an appropriate Analysis Model to describe what is going on in the problem. This step allows students to make the important link between the situation in the problem and the mathematical representation of the situation.