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Direct linkThanheiser, Eva – Educational Studies in Mathematics, 2010
This study was designed to investigate preservice elementary school teachers' (PSTs') responses to written standard place-value-operation tasks (addition and subtraction). Previous research established that PSTs can often perform but not explain algorithms and provided a four-category framework for PSTs' conceptions, two correct and two incorrect.…
Descriptors: Preservice Teachers, Elementary School Teachers, Subtraction, Mathematics Instruction
