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Walking Polygons
Source Institutions
In this activity, learners walk the sides and interior angles of various polygons drawn on the playground. As they do so, learners practice rotating clockwise 180° and 360°.
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How to Learn Basic Shapes by Making a Shape Mobile
Source Institutions
In this activity, caregivers and young learners work together to craft and talk about shapes and relative positions of such shapes by creating a mobile.
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Tri, Tri Again
Source Institutions
Learners estimate how many small triangles will fill a larger shape. Then they use a triangle stamp (or stencil made from a file folder) to fill the larger shape with triangles.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-488.jpg?itok=uxW47uvg)
Tangram Challenge
Source Institutions
In this activity, learners use tangrams ( 7-piece puzzle tiles) to assemble a variety of shapes. Tangrams are ideal for improving spatial reasoning and geometry properties.
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Patterns and Relationships: Struts 'n Stuff
Source Institutions
In this math lesson, learners identify the relationship between the number of sides in a regular polygon and the number of struts needed to make each polygon rigid.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-551.png?itok=YN1nXKxw)
Handy Measuring Ratio
Source Institutions
In this activity, learners use their hands as tools for indirect measurement.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-707.jpg?itok=AZbdx-Ur)
Spinning Cylinder: Make a triangle appear on a spinning wheel
Source Institutions
Spin a short piece of PVC pipe that's been marked up, and watch a triangle appear. Enjoy this optical illusion from the Exploratorium's Science Snack series.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-550.png?itok=d-udyYKX)
Pocket Protractor
Source Institutions
In this activity, learners create angle-measuring devices--protractors--out of paper. Learners follow a series of steps to fold a square sheet of paper into a triangular Pocket Protractor.