This site doesn't ask for your name, doesn't use adverts, and doesn't track you.

On your device

Activities remember how far you got, and your best scores, on the device you're using. That stays on the device and is never sent anywhere. The site also remembers whether you chose light or dark and whether sound is on.

To delete an activity's progress, press Start again at the bottom of it. Clearing your browser's data for this site deletes all of it.

The live Clock Speed game

When your teacher runs a live game, you join with a room code and a CPU name you make up. Use a nickname, not your real name. The server keeps your CPU name and scores so the class podium can show them, and deletes the whole room after a day.

Joining sets one cookie so the game knows you if your connection drops. It goes when you close the browser.

Like any website

The server sees your device's internet address when it sends you a page, as every website does. This site doesn't use it to identify you.

Questions? Ask your computing teacher.