Scaling-continuous variation: supporting students’ algebraic reasoning
Scaling-continuous variation: supporting students’ algebraic reasoning
复制标题
尺度连续变化:支持学生的代数推理
DOI:
10.1007/s10649-020-09951-6
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发表时间:
2020
影响因子:
3.2
通讯作者:
Tasova, Halil
中科院分区:
文献类型:
--
作者:
Ellis, Amy;Ely, Robert;Singleton, Brandon;Tasova, Halil
This paper introduces a new mode of variational and covariational reasoning, which we call scaling-continuous reasoning. Scaling-continuous reasoning entails (a) imagining a variable taking on all values on the continuum at any scale, (b) understanding that there is no scale at which the continuum becomes discrete, and (c) re-scaling to any arbitrarily small increment forxand coordinating that scaling with associated values fory. Based on the analysis of a 15-h teaching experiment with two 12-year-old pre-algebra students, we present evidence of scaling-continuous reasoning and identify two implications for students’ understanding of rates of change: seeing constant rate as an equivalence class of ratios, and viewing instantaneous rate of change as a potential rate. We argue that scaling-continuous reasoning can support a robust understanding of function and rates of change.
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影响因子:
3.2
作者:
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通讯作者:
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DOI:
10.1016/j.jmathb.2010.12.001
发表时间:
2011
期刊:
The Journal of Mathematical Behavior
影响因子:
--
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R. Ely
DOI:
10.1023/a:1021147132127
发表时间:
2002
期刊:
International Journal of Computers for Mathematical Learning
影响因子:
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作者:
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通讯作者:
W. Stroup
DOI:
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发表时间:
2003
期刊:
影响因子:
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作者:
M. Carlson;N. Smith;Joni Persson
通讯作者:
Joni Persson
DOI:
10.4324/9781410602725.ch11
发表时间:
2000
期刊:
International Journal of Current Pharmaceutical Research
影响因子:
--
作者:
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通讯作者:
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