# Number line

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* getallenlijn (dutch)

## General

In basic mathematics, a number line is a picture of a straight line on which every point is assumed to correspond to a real number and every real number to a point. Often the integers are shown as specially-marked points evenly spaced on the line.

## References

- Gravemeijer, K. (1993). The empty numberline as an alternative means of representation for addition and substraction . In J. d. Lange, C. Keitel, I. Huntley and M. Niss (Eds.), Innovation in mathematics education by modelling and applications. (pp. 141-159). London: Ellis Horwood.
- Pearn, C. and Stephens, M. (2007). Whole number knowledge and number lines help to develop fraction concepts ([{{{3}}} pdf]). In J. Watson and K. Beswick (Eds.), Proceedings of the 30th annual conference of the mathematics education research group of Australasia (pp. 601-610): MERGA.
- Teppo, A. and Van den Heuvel-Panhuizen, M. (2013). Visual representations as objects of analysis: The number line as an example (pdf). ZDM International Journal on Mathematics Education, Online first, 14.

## Versions of this document

- 20130813, wikiteam