Monday, 30 November 2015

Numerical, Algebraic, Graphical and Diagrammatic representations in the new KS3 maths

Recently we have been reviewing the KS3 programme of study in relation to the new KS3 National Curriculum and also how our KS3 programme relates to the changes in the KS2 curriculum to see whether we need to make changes due to overlap. In my perusal of the KS3 curriculum document this phrase jumped out at me:
  • move freely between different numerical, algebraic, graphical and diagrammatic representations
I must admit my immediate thought was 'ambitious' at least in terms of the "move freely" part; in my experience it is quite difficult to get pupils seeing different representations as representing the same thing. But then I thought how much fun it would be looking at all of the different representations at once and started thinking about how many I could come up with; here is my (not at all definitive) list:

  • Sequences: 1, 3, 5, 7, 9, 11, ....
  • Coordinates:  (1, 1), (2, 3), (3, 5), (4, 7), (5, 9), ...
  • Table of values  1     2      3       4      5
                                     1     3      5       7      9
  • Algebraic Sequence notation: Tn = 2n - 1
  • Line equation y = 2x - 1

  • One-dimensional diagrammatical representation:
  • Two-dimensional diagrammatical representation:

I definitely think it will be interesting to work with pupils and find ways of working with algebra in different representations - choosing a suitable representation for a problem and transferring from one representation to another as the need allows.

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