The use of alternative double number lines as models of ratio tasks and as models for ratio relations and scalingTools Küchemann, Dietmar, Hodgen, Jeremy and Brown, Margaret (2014) The use of alternative double number lines as models of ratio tasks and as models for ratio relations and scaling. In: 8th British Congress of Mathematics Education, 14 - 17 April 2014, University of Nottingham. Full text not available from this repository.
Official URL: http://www.bsrlm.org.uk/BCME8/BCME8-30.pdf
AbstractIn this paper we draw on ICCAMS project materials that used the double number line (DNL) to develop secondary school students’ understanding of multiplicative reasoning. In particular, we look at the use of a DNL, and its alternative version, as a model of ratio tasks, as a model for developing an understanding of ratio relations, and finally (but only briefly) as a model for developing the notion of multiplication as scaling.
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