We read every message. Whether you have found a bug, spotted a mistake, or have an idea for a tool that would help students, get in touch.

What you can contact us about

• Bug reports: tell us which tool, what you entered, what you expected and what you got. The device and browser you used helps too.
• Corrections: if a result or explanation looks wrong, let us know and we will check it.
• Tool ideas: suggest a new calculator or study tool you would like to see.
• Partnerships and other questions: teachers, schools and education sites are welcome to get in touch.

Response time

We aim to reply within 2–3 business days. Please don’t include sensitive personal information (such as passwords or ID numbers) in your email.