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Castle Basics
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In this four-day lesson, learners identify three-dimensional forms in castle design, research different parts of the castle with a focus on their uses, and design and enlarge a banner for the great ha

Exploring Tessellations (Grades 3-5)
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In this activity, learners repeat patterns in two and three dimensions to create tessellations.

Cut-Fold-Staple
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In this activity, learners discover how to rotate a flat shape into the third dimension. Learners draw and cut out a shape that has at least one straight edge on an index card.

Geometry Construction: Polyhedral Playthings
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In this activity, learners create 3D geometric shapes using straws and pipe cleaners.