median
don steward
mathematics teaching 10 ~ 16

Thursday, 20 July 2017

grid geometry parallels

Pierre van Hiele maintained that geometry should be started off using a square grid

it might be advantageous to describe (and define) parallel lines as having the same gradient/slope/journey/vector on a grid

dwelling on the properties of shapes:
  • parallel sides
  • right angles (perpendiculars)
  • equal sides
  • convex/concave
  • mirror symmetry and rotational symmetry
should probably precede the naming of shapes and classifying them

the powerpoint is here






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