On Sumdog you get a coin every time you answer a question correctly. As a special treat, you can earn double coins whenever you play Sumdog outside of school hours (depending on the hours set by the teacher).
Once you've answered around 100 questions on a "mastered" skill, you'll no longer be able to earn coins for it. Sumdog does this to reward you for making progress.
You will also be rewarded with 100 bonus coins when you play Sumdog for 30 minutes each week (Monday to Sunday). At the top of your home screen you will be able to see a time bar which will increase each time you play a Sumdog game.
If you have a Sumdog subscription, you can earn bonus coins by taking part in a challenge set by your teacher or parent.
You can see which skills you've mastered on the skill chooser:
- Click Choose skills on the left side of the screen.
- The skills that have been mastered will be marked green, and show an icon with a crossed out pile of coins. This means you will no longer earn coins by answering these questions.
- Choose another skill to practice and earn coins.