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Thesis (M.S.)

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How do children select the appropriate problem solving strategy? For example, given the problem of determining how many rolls of paper to buy in order to line kitchen shelves, most adults realize that a measurement strategy, to determine area, would be more economical than counting the shelves and buying an equal number of paper rolls. Yet, to children the appropriate solution strategy is not so obvious. What do adults realize about the nature of the problem that young children do not?