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Experiences with early algebra. (English)
Prim. Math. 19, No. 2, 23-26 (2015).
From the text: Mathematical writing helps learners to recognise that they are working at the same time at four different levels. These are: the activity of putting coloured rods end to end to form a “train"; the recognition that there are many ways to choose a pair of colours to combine; the simultaneous perception of the train and its component rods; and the awareness that the written sum is both inherent in the train and distinct from it.
Classification: H22 H32 U62 D52
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