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===Beiträge in wissenschaftlichen Büchern und Zeitschriften===
===Beiträge in wissenschaftlichen Büchern und Zeitschriften===
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*Obersteiner, A., Reiss, K. & Ufer, S.(2013). How training on exact or approximate
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*Obersteiner, A., Reiss, K. & Ufer, S.(2013). How training on exact or approximate mental representations of number can enhance first grade students' basic numberprocessing and arithmetic skills. Learningand Instruction, 23, 125-135.
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mentalrepresentations of number can enhance first grade students' basic numberprocessing and arithmetic skills. Learningand Instruction, 23, 125-135.
*Deiser,O. & Reiss, K. (in press). Knowledge transformation between secondaryschool and university mathematics. In A. Peter-Koop, S. Rezat & xx. xx (Eds.), XXX (pp.xx-xx). Heidelberg: Springer.
*Deiser,O. & Reiss, K. (in press). Knowledge transformation between secondaryschool and university mathematics. In A. Peter-Koop, S. Rezat & xx. xx (Eds.), XXX (pp.xx-xx). Heidelberg: Springer.