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• W2338389929 abstract "Co-variational reasoning has received particular attention from researchers and mathematics educators because it is considered of paramount importance for the understanding of concepts such as variable, function, rate of change, derivative, etc. Some of the critical issues that have been identified in several studies consist of the difficulty in interpreting the simultaneous variation of two quantities, particularly in overcoming coordination problems of two variables changing in tandem. A relevant question in the study of co-variational reasoning concerns representing the joint variation of quantities and performing translations between different representations. Problems of motion involving variation over time are strongly linked to the concept of co-variation and require the ability to translate a dynamic situation by means of mostly static representations. Those problems require the construction of a conceptual model that, in some way, visually contains dynamism. In taking solving and expressing as a unit of analysis and focusing on the ways in which commonly available digital technologies are used by youngsters as tools in problem-solving, we analyse the approaches used by the participants in SUB14 to a motion problem. Some surprising results of the content analysis of over 200 answers indicate that the textual/descriptive form of presenting a model of the situation had a clear dominance. The use of tabular representations along with pictorial/figurative content was also present in a high percentage of solutions. Furthermore the use of digital media was decisive in producing visuality, i.e. ways of depicting the displacement with time (quasi-dynamic representations)." @default.
• W2338389929 created "2016-06-24" @default.
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• W2338389929 date "2016-01-01" @default.
• W2338389929 modified "2023-09-24" @default.
• W2338389929 title "Digitally Expressing Co-variation in a Motion Problem" @default.
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• W2338389929 doi "https://doi.org/10.1007/978-3-319-24910-0_7" @default.
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