Classroom Origami

Shows nine origami models, such as a paper airplane, a heart, a cup and a ddakji, one large step at a time with a short instruction. Put it on the classroom screen and fold along with the class.

How to use

1. In the model list, check the difficulty, the time and the paper needed, then pick a model.
2. Move through the steps with "Next step" and "Previous step", the arrow keys or Space. A presenter remote works too.
3. Press R or "Replay this step" to watch the fold again, and F for full screen.
4. If you like, change the "Paper color" and set "Auto-advance" to 10, 20 or 30 seconds. Use "← All models" to go back.

How it works

• The pictures are computed from each fold, not drawn by hand. The colored and white sides look different, and the legend explains the lines and symbols.
• The order of folds was checked against published instructions in October 2026. Details that instructions leave open, such as ear angles, were chosen for this page.
• While a model is open the screen is kept awake. The paper color and auto-advance settings are saved in this browser.

Questions and answers

How do you fold a simple paper airplane?

The "Paper airplane" model uses one A4 sheet. Make a center crease, fold the top in to the center line twice, fold the sheet in half, then fold both wings down.

What is the difference between a valley fold and a mountain fold?

In a valley fold you fold the paper toward you, so the crease sinks like a valley. In a mountain fold you fold it away from you, so the crease rises like a ridge.

How many sheets does the ddakji need?

Two square sheets. Both are folded the same way and laid across each other, then the triangles are folded in and tucked, in 12 steps.

Is there a paper crane or a paper boat?

No. Steps that open the paper out or inflate it cannot be drawn exactly with flat folds, so those models are not included.