Email [email protected]. A person reads it. There is no ticket system, live chat, or phone number.
Useful notes
- A wrong grade or a formula that should have passed: include the exercise name and the formula you typed.
- A broken page: include the URL and what you expected to happen.
- A directory, classroom, or partnership note: say who you are and what you want to link or use.
What we cannot do
There is no account, so there is no password to reset and no progress to recover from our side. Passed exercises are stored only in your browser. See the privacy policy for what leaves your device and what does not.