Fair Spinner
Students commit to a prediction, spin to reveal, and argue whether the spinner is fair from the sector sizes.
Preview ▸Type the lesson you have in mind. Math Activity Studio builds a single-file, projection-ready interactive — predict-and-reveal, ready to run on the board in minutes, no setup, no code.
Predict which colour the arrow lands on, then spin.
What value of x keeps both pans level? Type your guess, then reveal.
Predict the cross-section, then drag the slice plane down a square pyramid.
No slides to build, no code to write. You describe the moment you want in class; the studio handles the rest and hands you something you can run today.
Write the grade, topic and the classroom move you want — “predict, then reveal,” a team competition, a misconception to surface. Plain language is enough.
The studio writes a single self-contained file, validates it, then tests it across phone, tablet and projector viewports — so it won’t break on the board.
Run it full-screen in present mode, tweak any version in a sentence, or export the single HTML file to share, host, or hand to a colleague.
Preview a working interactive, then remix it in a sentence to fit your class — your numbers, your grade, your wording.
Students commit to a prediction, spin to reveal, and argue whether the spinner is fair from the sector sizes.
Preview ▸A balance scale makes “do the same to both sides” visible. Guess the unknown, then reveal each step in order.
Preview ▸Predict the shape of a slice, then drag a plane through a prism or pyramid to test the conjecture live.
Preview ▸The studio doesn’t just generate — it makes sure the activity survives a busy display, a refresh, and a colleague’s laptop.
Full-screen, oversized controls and one clear question per view — designed to read from the back of the room on any projector.
Every revision is saved on a timeline. Compare versions, jump back, and keep the one that worked best with your class.
Each build is validated and tested across phone, tablet and projector sizes, so layouts won’t break mid-lesson.
Download one self-contained HTML file. No accounts for students, no install — open it anywhere, even offline.
Pin pacing notes and reflections to any version — what to say before the reveal, where to pause, what to watch for.
Change the grade, the numbers, or the format by typing a request. The studio rebuilds the activity around your change.
A private prediction before the reveal gives every student something real to defend — and makes one misconception visible enough to revise out loud. These principles are built into every activity.
A short private response before the reveal gives the class something real to compare against — not a guess they can quietly abandon.
One clear pause point before students discuss. The best interactive pages still need deliberate wait time to do their work.
Large controls and one visible question help the activity survive a busy classroom display and read from anywhere in the room.
The strongest reveal makes one misconception visible enough that students want to revise their thinking aloud.
Describe the activity you want and watch it build. No slides, no code, no install — just the moment you wanted in class.
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