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I created this classroom display to show off the different modular origami projects I have created over the years from sonobe units. Almost every year, I make origami sonobe hexahedrons and cubes with my students. Some students opt to create additional sonobe units to create larger units.

Now that I have them hanging from the ceiling, students can see the names of the different origami models and how many sonobe units are required to build them. I also like that having them on display from day one will build student anticipation for when we finally learn to create them. Usually, I do origami as an end-of-year project.

As a first year teacher, I purchased a copy of Unfolding Mathematics with Unit Origami. From this book, I learned to fold sonobe units which can be assembled into various different modular origami pieces.

While this origami book is an excellent resource, you don’t have to purchase it to learn how to fold a sonobe unit. Maths Craft New Zealand has a nice printable set of directions for folding a sonobe unit. I have printed these instructions and given them directly to students. They also have a printable tutorial for assembling six sonobe units into a cube and a tutorial for assembly twelve sonobe units into an octahedron.

I cut regular colored copy paper into 8.5″ squares for students to use for origami building. If you are wanting to make decorations for your own classroom, you can use 12″ scrapbook paper to make jumbo-sized origami models.

Full Disclosure: It took me 9 years of teaching students to fold sonobe units to learn how to build the 30 piece icosahedron. There are some excellent YouTube videos that show various assembly methods. I recommend checking these videos out to learn how to assemble the larger units.

The great thing about the octahedron is that it only requires 12 sonobe units. Usually, I tell students that if they build two cubes that they can take them apart and assemble them into an octahedron.

For the colliding cubes, build one cube as normal. Then, take apart one of the corners and add in the additional three sonobe units.

Cubes are definitely a student favorite. They require six sonobe units. They are the most straight-forward model to assemble.

The hexahedron is also known as “Toshie’s Jewel.” It only requires three units. I often have students build two hexahedrons to begin with. Then, they can take the two hexahedrons apart and form the cube.

I used fishing line to hang my modular origami units from the ceiling.

There is a binder clip inside each origami model that the fishing line is tied to. It isn’t perfect. A large metal washer would work better, but I didn’t have any in my classroom on the day I decided to hang these up. I do have binder clips galore, though.

I could just look at these all day long. They make my math teacher heart so happy.

I am sharing the posters I created to hang under each model at the bottom of this post in case you want to create your own modular origami display.

I printed the names on regular copy paper and glued them to colored cardstock.

Warning – don’t hang these up unless you plan to let your students build them! They will bug you relentlessly until you give in. (True Story – this happened to me during my first year of teaching.

My sister had built a sonobe cube and octahedron as a MathCounts student. She gave them to me to decorate my first ever classroom. Students begged me at least once a week to build their own until I finally learned how!)

There is a larger icosahedron that I have not built *yet* it requires 90 sonobe units! Maybe someday…

## Free Download of Sonobe Origami Posters

Sonobe Labels (PDF) (1426 downloads)

Sonobe Labels (Editable Publisher File ZIP) (861 downloads)

## More Free Printable Math Posters

- Concavity Posters
- ASTC Trig Quadrant Poster (CAST Diagram)
- Factorial Poster
- Math Valentine Conversation Hearts Posters
- 5 Free Printable Trigonometry Posters
- Equality and Inequality Symbols Posters
- Modular Origami – Sonobe Classroom Display
- Unit Circle Magnets
- Trig Functions Posters
- Parts of a Radical Poster
- Roman Numerals Poster
- Parts of a Right Triangle Poster

## More Fun End of Year Activities

- Game of Sim
- Circle Tic Tac Toe
- Ultimate Tic Tac Toe
- Left Center Right Dice Game
- 52 Fun End of Year Activities for Math Class
- Impossible Domino Tower
- Strimko Puzzles in the Classroom
- Impossible Domino Bridge Puzzle
- Let’s Make Squares Activity
- Modular Origami – Sonobe Classroom Display
- Four Color Theorem Activity
- Wild Tic Tac Toe