Divisible Dash, in one page
An arcade game that drills the divisibility rules for 2 to 10, with free class boards for the teacher. Made by a serving maths teacher. divisibledash.com
What pupils do
Numbers fall down the screen. Swipe right if the number is divisible by the current rule, left if it is not. Wrong answers stack up and end the run; correct answers charge a lightning strike that clears the stack. Rules arrive in tiers: 2, 5 and 10, then 3, 9, 4, 6 and 8, then 7.
Everyone in the world gets the identical Daily Challenge each day, so the class board is a straight race.
What you see
A class leaderboard per tier, by day or across the week. Per-rule accuracy for the whole class and for each pupil, with the weakest rule named. Accuracy by number size, improvement across the range, and how much each pupil has played.
Everything on screen exports to CSV, so a department can keep its own record.
What it costs
Nothing for the school. The teacher dashboard, class codes and class boards are free.
In the app the Daily Challenge is free every day. One optional one-time unlock opens unlimited practice and Drill Mode. No adverts, no subscriptions, no tracking, and nothing a pupil can be charged for repeatedly.
Two minutes to a live class
- Create a free teacher account at divisibledash.com/teachers.
- Create a class. You get a six-letter code.
- Print the code sheet for the classroom wall. It carries the code and a QR to the app.
- Pupils tap JOIN CLASS in the app and type the code. That is the whole join: no pupil accounts, no pupil email addresses, no consent forms to chase.
Look before you commit
- A demo class, no account needed. Open divisibledash.com/teachers/?demo=1 for a full dashboard of invented pupils, clearly labelled, with no pupils of your own involved.
- A class board in any browser. divisibledash.com/class/ shows a class board from the code alone. No app, no account, safe to project.
- The rules themselves. divisibledash.com/rules/ explains all nine with worked examples, free to use in a lesson whether or not you use the game.
What a head of department asks first
- Pupils never type personal data. They play as a picked name such as SwiftFalcon42, chosen from curated word lists. There is no free text anywhere in the game, and no chat.
- No pupil accounts, no pupil emails. The class code is the entire join, and it can be changed or the class archived at any time.
- Real names only where you typed them. A roster (first name and last initial) is optional, and lets you match picked names to pupils. It is visible to you alone. Your school is the data controller; the class board is built from picked names only, so it stays safe on a projector.
- The paperwork exists. Privacy policy at divisibledash.com/privacy, Teacher Terms at divisibledash.com/terms.html, and a schools data-processing agreement at divisibledash.com/dpa.html.
The app arrives on the App Store and Google Play in September 2026. Teacher accounts, class codes and the browser class boards work now.