We are getting ready to start our unit on bridges. I wanted to review 3D shapes and parts.
I started with a lesson on the strongest shape, a square or a triangle. I used the AngLegs and gave each group a triangle and a square made with them. We held them and pushed down on the top of the shape. The square collapsed. The kids quickly saw that the triangle was stronger. I gave them one more angle piece and I asked them if they could make the square stronger. Students added the piece diagonally and identified that the square was made of two triangles.
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| AngLegs |
We discussed new vocabulary and what happened to our square.
We watched the Design Squad video showing a few demonstrations of strong triangles.
I then challenged groups to build with straws and connectors. Each group had to make different 3D shapes and test to find the strongest shape. My students love this kit! I highly recommend them. They are very sturdy and would be great for math or recess.
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| Straws and Connectors |
Our strongest shape!
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