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Natural selection, with your class as the predator.

Run natural selection on the room itself. In the peppered moth simulation every phone is a bird hunting its own patch of bark, and the moths the class misses live to breed. When the woods turn to soot, the drawer of specimens on the projector fills with dark moths, though no moth ever changes colour. The screen shows counts only, never names.

Hunt the peppered moths

A practice run with fictional students. No real classroom or join code is created.

Try an answer on the phone. Lead the lesson from the screen.

On their phone

You are presenting

Setting up the room…

  • Your hunt—

    Hunt the peppered moths

    Every phone is a bird. Each hunt, it shows its own patch of bark with moths resting on it, light and dark, and twenty pecks for the ones it can see. The moths the room misses live to breed: after each hunt the big screen's drawer of a hundred specimens is re-pinned, and a line follows the share of dark moths. After one hunt on lichen the woods turn to soot, and the dark moths the room can no longer see take over. No moth changes colour. Counts only: the screen never shows a patch or a peck, and each phone sees only its own.

    Up to 600 people · 2 acts

    Natural selectionFitness

    How it plays, and how to run it

Every activity here ships with Decka — sign up free and add any of them to your library from the built-in classroom catalog.

How it works

  1. 01

    Add it to your library

    Sign up free and pull the activity from Decka's built-in classroom catalog — one click copies it into your own library, ready to run from Decka or inside PowerPoint.

  2. 02

    Students join by QR

    Everyone scans from the projector and plays in their phone's browser. No app, no account, nothing to install.

  3. 03

    You run the room

    You move the activity phase by phase: collection closes, the boards resolve on the big screen, and the debrief happens while the results are still up.

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