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7th
and 8th graders studied transformations in
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the coordinate
plane. Students practiced
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reflecting
triangles and quadrilaterals over
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both the x and
y-axes using graph paper and
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derived rules
based on their end products.
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Students then
tested their conjectures by
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performing the
reflections using Geometer’s
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Sketchpad. The
cumulative project allowed
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students to
create their own figure, reflect it in
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both axes, and
explain how the coordinates
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changed. This
software has allowed students
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to reinforce
several fundamental principles in
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geometry in a hands-on
manner
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