Let’s pretend you’re back in math class. You might need to figure out answers to the following questions: If your doctor gave you three pills and told you to take one every half hour, how long would ...

Twenty-four first-grade children were asked to write number sentences and select appropriate alternative number sentences for addition and subtraction word problems. Responses were qualitatively ...

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Merlyn J. Behr, Helen A. Khoury, Guershon Harel, Thomas Post and Richard Lesh This study explores preservice teachers' understanding of the operator construct of rational number. Three related ...