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A question, a mistake you spotted in an exercise, an idea, a request about your data? Write to us: we will reply to the email address you give, usually within a few days.

To delete the account or export progress, there is no need to write: you can do it all in the app, from the Parents’ area.

Only used to reply to you.

For a mistake in an exercise, please mention the year group and the calculation.

Your address and message are only used to reply to you and are deleted after one year. Learn more: privacy policy.