Amplify Activity Builder imports a saved Polypad URL. It does not import the live Next.js page, the animated Three.js scene, or a raw JSON file as a teacher upload.
The reliable classroom version is a native Polypad: use the exported 2D image as a locked background, then rebuild the manipulatives with Polypad tiles students can move, measure, and edit.
inside polypad
Build the native canvas
Open polypad.amplify.com/p and sign in.
Create a new Polypad with a fixed canvas.
Upload quadratic-coast-2d-background.png as an image.
Resize it to fill the canvas, send it to the back, and lock it.
Add equation, polygon, rectangle, circle, ruler, protractor, number card, probability, and chart tiles.
inside activity builder
Import the saved Polypad
Save the rebuilt Polypad in your Amplify Polypad library.
Copy the saved Polypad URL.
Open your Amplify/Desmos Activity Builder activity.
Add a Polypad component to the screen.
Click inside the blank Polypad and paste the saved URL with CMD-V or CTRL-V.
student setup
What students should use
Move native tiles, not the background image.
Measure the sail polygon with ruler and protractor tools.
Use equation tiles to explain the quadratic curves.
Use number cards and charts to support a probability claim.
Compare two coast settings and justify which one has stronger wave evidence.
student polypad background
3D teacher reference
triangular prism sailcylinder buoyrectangular prism dock
1Upload the background
Use the exported 2D PNG as an image tile in Polypad, send it to the back, then lock it.
2Add native manipulatives
Rebuild the sail, dock, buoy, measurements, probability cards, and equations with native Polypad tiles.
3Save and paste URL
Save the Polypad, copy the Polypad URL, add a Polypad component in Activity Builder, and paste the URL.