Stage: 2 Challenge Level: 
Move the green spot along the tube by moving the yellow spot.
Explain how you did it.
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The yellow spot does not follow this grey tube.
I wonder if there is a tube which the yellow spot and the green spot would both follow?
Could you draw one?
Practical Activity. Working systematically. Games. Addition & subtraction. Trial and improvement. Visualising. Interactivities. Tangram. Compound transformations. Symmetry.
Published October 2006.
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