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The purpose of this study was to investigate properties of children's naturally occurring arguments. The arguments were sampled from transcripts of 20 discussions held in 4 fourth-grade classrooms. The principal findings were that (a) children's arguments are filled with seemingly vague refemng...
Several earlier investigations found that teaching standard textbook physics causes only moderate change in qualitative understanding. Many investigations have tried to explain why teaching textbook physics results in so little learning of qualitative physics. In contrast, we examined cases...
In this article, I concentrate on the linguistic aspects of modeling, primarily investigating the uses of notations over tasks that consist of multievent temporal phenomena. Specifically, I describe attempts by a group of 7th graders who were algebra beginners to reformulate narratives using two...
This article is devoted to two interrelated semiotic aspects of the placevalue system: multiplicity of value and composition of values. Both aspects involve the basic characteristic of the placevalue system-the differentiation between face value and complete value. We explored whether a system...
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