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Contact us
We would love to hear from students, parents and teachers. The quickest way to reach us is by email.
What is your message about?
- Report a mistakeSpotted a wrong fact, answer or typing error? Tell us the page and what is wrong.Write an email →
- Suggest a topic or labWant a topic explained more clearly, or a virtual lab for an experiment?Write an email →
- Teachers and schoolsUsing the site with your class, or want to help check notes for your subject?Write an email →
- Anything elseQuestions, feedback or just to say hello.Write an email →
Reporting a mistake
It helps us fix things quickly if you include:
- the page link (copy it from your browser's address bar),
- what is wrong, and what you think it should say,
- if you can, where you checked it (for example, your textbook and page number).
The buttons above open your email app with the subject already filled in. If nothing opens, copy the address [email protected] into your email. We never ask for passwords, and we never share your email address. See our privacy policy.