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Everything in one place for class.

Find a simulation, video, reading, or classroom-ready link by topic.

In the classroom

  • Present

    Full screen or Present mode puts the model on the projector, with a small dock that keeps Annotate and Capture in reach.

  • Draw on it

    Annotate gives a pen, highlighter, text, arrows and boxes, plus a laser pointer and a spotlight for the back of the room. Marks stay on the device.

  • Capture

    Save a clean picture for a slide, or record the screen with your voice and camera. Captions can be made on the device before you save the video.

  • Share a setup

    A share link carries the setup of a simulation, never a name. Add ?student=1 to a classroom simulation link and the teacher tools stay out of the way.

  • Teach a lesson

    The classroom simulations carry a teacher kit: one-click lesson setups, predict then reveal with a class tally, discussion prompts, teacher notes and a countdown.

  • No accounts

    Students never sign in or give personal information. There are no ads and no tracking cookies.

Email updates

A short note when a new simulation, video or chapter goes up. Unsubscribe anytime. Read past issues.

Donate

I make these tools in my spare time and keep them free for classrooms. If they've helped you, any gift goes toward the costs of running them, and it truly means a lot.

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