Do First Graders Make Efficient Use of External Number Representations? The Case of the Twenty-Frame

Author: Obersteiner Andreas   Reiss Kristina   Ufer Stefan   Luwel Koen   Verschaffel Lieven  

Publisher: Routledge Ltd

ISSN: 0737-0008

Source: Cognition and Instruction, Vol.32, Iss.4, 2014-10, pp. : 353-373

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