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Lesson�6:�The�Splitting�Wedge
Teacher’s Notes
They will find it very difficult to pull
apart the sheet of paper because
paper is strong when under tension,
or stretching forces, but it is easy to
tear. Tearing, however, produces very
ragged edges.
 • Demonstratehowusingscissorsnotonlymakescutting
paper very simple – the edges of the scissors are sharp
- but also allows them to cut paper accurately in lines
or curves.
The cutting edges of the scissor
blades resemble two opposing knife
blades moving across each other. As
the blades slice down and up through
the paper, the separated pieces move
sideways. Use the magnifying glass to
show the children the wedge shaped
blade edges.
 • Talkabouthowothercuttingtoolsworkinsimilarways.
 • Youmaywanttopersonallydemonstratehowaknife
cuts through an apple or a piece of cheese, or how a
hand-axe can be used to split a thin piece of wood.
Use caution regarding splinters that may be caused by
the splitting of the wood. Ask the children to carefully
observe what happens.
As the axe or knife moves downwards,
the object splits and the separated
parts move sideways away from the
blade (wedge).
Education
®
37


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