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

Küchemann, Dietmar; Hodgen, Jeremy; Brown, Margaret

Authors

Dietmar Küchemann

Jeremy Hodgen ttzjh@exmail.nottingham.ac.uk

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.

Publication Date Jan 1, 2014
Peer Reviewed Not Peer Reviewed
APA6 Citation K├╝chemann, 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
Keywords Double number line, ratio, scaling, multiplicative reasoning
Publisher URL http://www.bsrlm.org.uk/BCME8/BCME8-30.pdf
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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BCME8-30.pdf (791 Kb)
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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