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The understanding of representation has a clear significance for the design and development of learning technologies. The issues raised by this design and development has led to a demand for appropriate language and form of conceptualisation. However we are insufficiently familiar with the way in which different types of mediated tool use occur, to develop(More)
We conducted two design experiments aimed at engaging sixth graders (11 years old) in statistical reasoning about center and variation. We examine in particular students' informal notion of a " modal clump. " Using Peirce's concept of diagrammatic reasoning, we analyze the interplay of 1) making plots with TinkerPlots – a computer data analysis tool, 2)(More)
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