Stellated Icosahedron Project {20 Pointed Star Project} Part One

Every year I do this fun end of year project with my students. They love it, I love it, and it saves my sanity after testing.  Seriously, the first day or two is rough because the students don’t want to listen to instructions, but once they get the hang of the project, they pretty much go on auto pilot. It’s scary how quiet they get as they get as they work on the points of the star.  With the end of the 3rd quarter this week, I figured it’s the perfect time to share this project!  I’m sure I’m not the only one thinking about all the things that have to happen as the year comes to a close!


Overall, the project will take the students about a week to complete because of the instruction and organization needed. It takes a lot less time if teaching someone one on one!  This project is perfect for 7th, 8th, or high school math classrooms. It is super fun and perfect for the week or two after testing that you end up not having much to do! Plus, we do talk about math concepts while we complete the project.

Example topics to cover:

  • Two-Dimensional vs Three-Dimensional
  • Regular Shapes
  • Review two-dimensional shapes and introduce names of three-dimensional solids with regular faces (called platonic solids)
  • Area (each face), Surface Area, Volume
  • Vocabulary: Edge, vertex, face
  • Euler’s Formula
  • Platonic Solids and this funny video and this video
  • Stellations

I usually create a handout/packet for them to complete as we build the stellated icosahedron to review topics previously taught.

I’m going to divide the project into a couple of different posts to create a little mini series. Plus, it’s too much to cover in one post. Here are the topics:

1. Materials and Organization Tips

2. Getting Started

3. Icosahedron (inside part)

4. Stellations (points)

5. Variations/Extensions

I hope you’ll join me on my first mini series!


7 thoughts on “Stellated Icosahedron Project {20 Pointed Star Project} Part One

  1. Pingback: 20 Pointed Star Project {Materials & Organization Tips} Part Two |

  2. Pingback: 20 Pointed Star {Getting Started} Part Three |

  3. Pingback: 20 Pointed Star {Icosahedron} Part Four |

  4. Pingback: 20 Pointed Star {Stellations} Part Five |

  5. Pingback: 20 Pointed Star Project {Extensions and Variations} Part Six |

  6. Do you have an instruction sheet for students that you would be willing to share? Do youod anything for them at first?

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