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The use of alternative double number lines as models of ratio tasks and as models for ratio relations and scaling

K�chemann, Dietmar; Hodgen, Jeremy; Brown, Margaret

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Authors

Dietmar K�chemann

Jeremy Hodgen

Margaret Brown



Abstract

In 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.

Citation

Küchemann, D., Hodgen, J., & Brown, M. (2014). The use of alternative double number lines as models of ratio tasks and as models for ratio relations and scaling.

Conference Name 8th British Congress of Mathematics Education
End Date Apr 1, 2014
Publication Date Jan 1, 2014
Deposit Date Mar 14, 2016
Publicly Available Date Mar 14, 2016
Peer Reviewed Not Peer Reviewed
Keywords Double number line, ratio, scaling, multiplicative reasoning
Public URL https://nottingham-repository.worktribe.com/output/999043
Publisher URL http://www.bsrlm.org.uk/BCME8/BCME8-30.pdf

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