Geometric

The third day of Origami University will focus on geometric origami. This day is all about exploring the different ways paper can be folded to create shapes, patterns, and structures. Participants will have the chance to try both simple and more intricate designs, discovering the variety and creativity that geometric folding can offer.

Throughout the day, classes will highlight different styles of geometric origami, giving participants the opportunity to experiment with new techniques and approaches. The schedule is designed so that everyone can find classes that match their experience and interests, whether they are just starting out or looking for a more challenging project.

OrigamiUSA Junior Board members will also teach classes on simpler models, offering a welcoming introduction to geometric folding. These sessions provide an easy entry point while still being enjoyable for folders of all skill levels.

The day will run two tracks of classes at the same time, allowing participants to choose the sessions that fit their experience.

You are not yet registered for this day of Origami University. Register here for access to the live streams and subsequent recordings.

Schedule

Classes run April 4, 12:00 pm–April 4, 6:00 pm EDT.

Hour	Track 1 Zoom Room 1	Track 2 Zooom Room 2
12:00 pm–12:30 pm EDT	Introduction (GatherTown)
12:30 pm–1:30 pm EDT	Interstellar Evan Zodl	Aperture Star Will Kalish
1:30 pm–2:30 pm EDT	Euphoria Ilan Garibi	Fleurs d Orange Ekaterina Lukasheva
2:30 pm–3:00 pm EDT	Break
3:00 pm–3:30 pm EDT	Finish units/Gather.town time
3:30 pm–4:30 pm EDT	Mathematical Coincidences of U.S. Letter Paper Jeannine Mosely	Hana-bishi Charlene Morrow
4:30 pm–5:00 pm EDT	Dream Racer Cube Jimmy Yu
5:00 pm–5:30 pm EDT	Pseudo Hexagonal Flasher Jeremy Shafer
5:30 pm–6:00 pm EDT		Closing

Classes

Interstellar

Saturday, April 4, 2026, 12:30 pm to 1:30 pm EDT

Level:

High Intermediate

Presenter:

Evan Zodl

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In this class, you will learn how to fold an elegant modular/fractal star. Each iteration of the fractal is folded from six squares. We will start off with a single iteration. Then, time permitting, I will teach you how to cut squares, fold, and assemble the units for multiple iterations.

Supplies:

12 sheets of 6" kami to fold the units (6 sheets for the first iteration and 6 sheets for the second iteration, which will be cut into smaller squares).
1 sheet of 6" kami (to fold a template to prepare paper for smaller iterations)
Scissors or a paper cutter (to prepare squares for smaller iterations)

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Aperture Star

Saturday, April 4, 2026, 12:30 pm to 1:30 pm EDT

Level:

Intermediate

Presenter:

Will Kalish

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This class is to learn my Aperture Star, a model I designed last summer. I love this model, as it looks equally good from both the front and the back. It is folded from 8 squares. I usually use 3” or 1.5” Kami, although I will be teaching with 6” Kami, which is what I recommend using for your first time folding this model.

Supplies:

Requires 8 sheets, I prefer 3 inch paper but will be teaching it with 6 inch

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Euphoria

Saturday, April 4, 2026, 1:30 pm to 2:30 pm EDT

Level:

Low Intermediate

Presenter:

Ilan Garibi

Track:

Details

In this workshop, we will learn how to fold a single molecule of Euphoria, and a 2 by 2-molecule project. Please prepare in advance a 6 by 6 grid on the small paper and a 13 by 13 grid on the larger one.

Supplies:

2 squares of Elephant Hide work best. 12 cm and 24 cm or 5 inches and 10 inches.

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Fleurs d Orange

Saturday, April 4, 2026, 1:30 pm to 2:30 pm EDT

Level:

High Intermediate

Presenter:

Ekaterina Lukasheva

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Come learn a clever variation of Rafaelita kusudama: the model that has so many delicate petals you can curl!
Level: Intermediate/high intermediate (more complex than easy modular but not nearly as complex as representative origami. Will contain one tricky reverse fold

Supplies:

For 12 unit model (not in the picture, but faster to achieve): 12 square pieces of paper. 3-6 inch squares depending on your experience level. For 30 unit piece: I recommend 3 inch squares for people who has experience with modulars or 4 inch squares for less experienced. Having a pair of tweezers will help connect it and twirl the petals, plus some small clothespins during assembly

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Mathematical Coincidences of U.S. Letter Paper

Saturday, April 4, 2026, 3:30 pm to 4:30 pm EDT

Level:

Low Intermediate

Presenter:

Jeannine Mosely

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In this lecture I will discuss some surprising aspects of the aspect ratio of U.S Letter Paper, and ways that we can use these coincidences to fold various geometric shapes. I will also teach a quick model (the Star Crown) that relies on one of these ratios.

Supplies:

Students should have on hand 5 or more sheets of U.S. letter paper (8.5" x 11"). If you are outside the U.S. and only have A4 paper, I will demonstrate a quick method of converting A4 to US letter proportions.

The Star Crown is diagrammed in "The Paper" issue 136.

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Hana-bishi

Saturday, April 4, 2026, 3:30 pm to 5:30 pm EDT

Level:

High Intermediate

Presenter:

Charlene Morrow

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Creator(s):

Tomoko Fuse

We will fold and assemble modular units to form this "open cuboctahedron" shape with some clever constructions along the way. The model requires fairly precise folding to fit together well and look its best, so be prepared to take some time to make accurate units.

Supplies:

1. You need 12 squares to make the 6 "faces" of the model. If you want to make these faces from 2 colors as shown in the photo, you need 6 squares of each color. You can choose other color arrangements or make them just 1 color each, or random. There are lots of possibilities. We will discuss after learning to fold the model.
2. You will need 12 squares to make the decorative elements on the faces. This paper is a black & white pattern paper in the photo.
3. I suggest you choose 6" square paper for learning. Smaller paper looks great, but is harder to handle unless you are very skilled with it. Choosing paper colors that contrast well enhances the look of the model.
4. You will need a paper slicer or scissors. Please wait until the class starts to cut the paper to make sure you cut them in the right way.

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Dream Racer Cube

Saturday, April 4, 2026, 4:30 pm to 5:00 pm EDT

Level:

Simple

Presenter:

Jimmy Yu

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We'll learn how to fold this cute cube! This 6-unit modular has a simple folding process and can be assembled to form a striking and unique geometric look.

Supplies:

6 sheets of kami, anywhere between 3" to 6"

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Pseudo Hexagonal Flasher

Saturday, April 4, 2026, 5:00 pm to 6:00 pm EDT

Level:

Low Intermediate

Presenter:

Jeremy Shafer

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In this class I will teach a new flasher model I recently designed which was inspired by Luke Meng's request for me "to teach a geometric model, perhaps one of your flashers, on the geometric day." This model, the Pseudo Hexagonal Flasher, is what I came up with, and it actually has opened the door to a whole new group of flashers which I call Pseudo Triangular Flashers.

Supplies:

10-inch kami

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