A great classroom activity to introduce 3 dimensional geometry.
You will need
• 600 bendable straws
• A set of 17 task cards
• Scissors and Tape
• A data chart for each student
• Set of directions
To connect two straws, slightly flatten the short part of the bendable straw up to the bend. Fold
over the straw, up to the bend and insert that crushed end into the long end of another
straw. A figure illustrates this step. Another figure illustrates what three straws connected to form an equilateral triangle look like.
The product includes 17 task cards. Distribute these task cards. Notice how many straws each group will need. Some groups can build more than one polyhedron while others may only have time to build 1 polyhedron. Task 1 card says “Use 24 straws to make a shell for a solid that contains 6 squares. This shape is called a hexahedron or a square prism.” This group would get 24 bendable straw to make 6 squares. Then the group will tape the six squares together to form a hexahedron or a square prism.
After the class has made their polyhedron the polyhedron should be displayed around the classroom. Using the polyhedron the students should use the enclosed chart to count the number of faces, edges, and vertices on each polyhedron and then look for a pattern in the number of faces, edges and vertices. This relationship is often called Euler’s Formula.
Comments from buyers:
• Great resource!!!
• Center type activity that my upper elementary students handled well!
• Polyhedrons are so much fun!!!
• What an awesome, fun project for my Honors Geometry. They loved it!!!!