Assessing fifth grade children's rational number knowledge in a non-verbal application context: the darts game
In: Recherches en didactique des mathématiques, Jg. 7 H. 3, S. 51-74
Construct a sum: a measure of children's understanding of fraction size
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In: Journal for research in mathematics education, Jg. 19 H. 3, S. 215-232Order and equivalence of rational numbers: a cognitive analysis
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