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Essential Content for Elementary Teachers

I. Understand symmetry and identify line symmetry and rotational symmetry in geometric shapes and objects

II. Understand transformations of geometric shapes

     A. Congruence

1. Translation (slide)

2. Reflection (flip)

3. Rotation (turn)

4. Glide reflection (glide)

     B. Similarity: dilation (enlarge and shrink)

     C. Topological: distortion

III. Define, understand, and develop tessellations by hand and on the computer; understand which shapes will tessellate and why

Tutorials

Transformational Geometry

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